CVE-2026-22316

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-22316", "assignerOrgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "state": "PUBLISHED", "assignerShortName": "CERTVDE", "dateReserved": "2026-01-07T11:49:15.177Z", "datePublished": "2026-03-18T07:33:31.584Z", "dateUpdated": "2026-03-18T15:08:43.181Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "FL SWITCH 2005", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2008", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2016", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL 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PN", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2208C", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2212-2TC-2SFX", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2214-2FX", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2214-2FX SM", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2214-2SFX", 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"Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2708", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2708 PN", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2303-8SP1", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL NAT 2008", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL NAT 2208", "vendor": "Phoenix Contact", 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"versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH TSN 2316", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH TSN 2312-2GC-2SFP", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH TSN 2314-2SFP", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 5924-4GC", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 5916-8GC-4SFP+", "vendor": "Phoenix 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user privileges for the webUI can use the setting of the TFTP Filename with a POST Request to trigger a stack-based Buffer Overflow, resulting in a DoS attack.<br>"}], "value": "A remote attacker with user privileges for the webUI can use the setting of the TFTP Filename with a POST Request to trigger a stack-based Buffer Overflow, resulting in a DoS attack."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-121", "description": "CWE-121 Stack-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "shortName": "CERTVDE", "dateUpdated": "2026-03-18T07:33:31.584Z"}, "references": [{"url": "https://certvde.com/de/advisories/VDE-2025-104"}], "source": {"advisory": "VDE-2025-104", "defect": ["CERT@VDE#641898"], "discovery": "UNKNOWN"}, "title": "Buffer Overflow using TFTP Filename", "x_generator": {"engine": "Vulnogram 0.1.0-dev"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-18T15:07:52.390399Z", "id": "CVE-2026-22316", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-18T15:08:43.181Z"}}]}}

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{"defaultStatus": "unaffected", "product": "FL SWITCH 2008F", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2316/K1", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2506-2SFP/K1", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 2508/K1", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH TSN 2316", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH TSN 2312-2GC-2SFP", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH TSN 2314-2SFP", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 5924-4GC", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 5916-8GC-4SFP+", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 5924SFP-4GC", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 5924-4SFP+", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "FL SWITCH 5916SFP-8GC-4SFP+", "vendor": "Phoenix Contact", "versions": [{"lessThan": "3.53", "status": "affected", "version": "0.0.0", "versionType": "semver"}]}], "source": "info@cert.vde.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A remote attacker with user privileges for the webUI can use the setting of the TFTP Filename with a POST Request to trigger a stack-based Buffer Overflow, resulting in a DoS attack."}, {"lang": "es", "value": "Un atacante remoto con privilegios de usuario para la webUI puede usar la configuraci\u00f3n del nombre de archivo TFTP con una solicitud POST para desencadenar un desbordamiento de b\u00fafer basado en pila, lo que resulta en un ataque de DoS."}], "id": "CVE-2026-22316", "lastModified": "2026-06-17T10:19:42.180", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "info@cert.vde.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-22316", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-18T15:07:52.390399Z", "version": "2.0.3"}}]}, "published": "2026-03-18T08:16:27.070", "references": [{"source": "info@cert.vde.com", "url": "https://certvde.com/de/advisories/VDE-2025-104"}], "sourceIdentifier": "info@cert.vde.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "info@cert.vde.com", "type": "Secondary"}]}

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"enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "fl_switch_5924-4sfp+", "vendor": "phoenixcontact"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.1.0,3.53)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "fl_switch_5924sfp-4gc", "vendor": "phoenixcontact"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.1.0,3.53)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "fl_switch_tsn_2312-2gc-2sfp", "vendor": "phoenixcontact"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.1.0,3.53)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "fl_switch_tsn_2314-2sfp", "vendor": "phoenixcontact"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.1.0,3.53)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "fl_switch_tsn_2316", "vendor": "phoenixcontact"}], "analysis": {"en": {"generated_at": "2026-03-18T08:51:16.542027+00:00", "value": {"mitigation_remediation": ["Check Phoenix Contact\u2019s website or the advisory at https://certvde.com/de/advisories/VDE-2025-104 for any firmware or software updates that address the TFTP filename handling issue.", "If no update is available, disable the TFTP feature in the device configuration or block POST requests to the TFTP endpoint via firewall or webUI access controls.", "Restrict access to the WebUI to a trusted internal network or VPN and enforce strong authentication to limit the number of users with write privileges.", "Monitor webUI logs for anomalous POST requests to the TFTP endpoint and consider additional network segmentation to isolate critical devices."], "summary": {"action": "Apply Update", "impact": "Denial of Service via stack-based buffer overflow"}, "threat_synthesis": {"affected_systems": "The vulnerability applies to an extensive list of Phoenix Contact FL devices, including FL NAT 2008, FL NAT 2208, FL NAT 2304\u20112GC\u20112SFP, and numerous FL SWITCH models such as FL SWITCH 2005, FL SWITCH 2008F, FL SWITCH 2016, FL SWITCH 2205, FL SWITCH 2408, FL SWITCH 2504\u20112GC\u20112SFP, and others enumerated in the known CNA vendors/products field. No specific firmware or hardware revision is indicated, so all current versions of these models are potentially vulnerable.", "description_and_impact": "A remote attacker who is able to authenticate to the device\u2019s WebUI can submit an oversized TFTP filename in a POST request. According to the vendor description, this input is improperly validated and causes a stack-based buffer overflow (CWE\u2011121). The overflow can crash the WebUI service or reboot the device, resulting in a denial\u2011of\u2011service (DoS) that disrupts network operations on the affected equipment.", "risk_and_exploitability": "The CVSS score of 6.5 indicates moderate severity, while the EPSS score is not provided, so the likelihood of exploitation is not quantified. The vulnerability is not listed in CISA\u2019s KEV catalog. Exploitation requires a user to be authenticated to the WebUI, limiting the attack surface to those with write privileges. Successful exploitation leads to a DoS, which could interrupt services on the affected network segment."}}}}, "created": "2026-03-19T08:56:54.313799+00:00", "updated": "2026-03-24T10:59:12.818146+00:00", "vendors": ["phoenixcontact", "phoenixcontact$PRODUCT$fl_nat_2008", "phoenixcontact$PRODUCT$fl_nat_2208", "phoenixcontact$PRODUCT$fl_nat_2304-2gc-2sfp", "phoenixcontact$PRODUCT$fl_switch_2005", "phoenixcontact$PRODUCT$fl_switch_2008", "phoenixcontact$PRODUCT$fl_switch_2008f", "phoenixcontact$PRODUCT$fl_switch_2016", "phoenixcontact$PRODUCT$fl_switch_2105", "phoenixcontact$PRODUCT$fl_switch_2108", "phoenixcontact$PRODUCT$fl_switch_2116", "phoenixcontact$PRODUCT$fl_switch_2204-2tc-2sfx", "phoenixcontact$PRODUCT$fl_switch_2205", "phoenixcontact$PRODUCT$fl_switch_2206-2fx", "phoenixcontact$PRODUCT$fl_switch_2206-2fx_sm", "phoenixcontact$PRODUCT$fl_switch_2206-2fx_sm_st", "phoenixcontact$PRODUCT$fl_switch_2206-2fx_st", "phoenixcontact$PRODUCT$fl_switch_2206-2sfx", "phoenixcontact$PRODUCT$fl_switch_2206-2sfx_pn", "phoenixcontact$PRODUCT$fl_switch_2206c-2fx", "phoenixcontact$PRODUCT$fl_switch_2207-fx", "phoenixcontact$PRODUCT$fl_switch_2207-fx_sm", "phoenixcontact$PRODUCT$fl_switch_2208", "phoenixcontact$PRODUCT$fl_switch_2208_pn", "phoenixcontact$PRODUCT$fl_switch_2208c", "phoenixcontact$PRODUCT$fl_switch_2212-2tc-2sfx", "phoenixcontact$PRODUCT$fl_switch_2214-2fx", "phoenixcontact$PRODUCT$fl_switch_2214-2fx_sm", "phoenixcontact$PRODUCT$fl_switch_2214-2sfx", "phoenixcontact$PRODUCT$fl_switch_2214-2sfx_pn", "phoenixcontact$PRODUCT$fl_switch_2216", "phoenixcontact$PRODUCT$fl_switch_2216_pn", "phoenixcontact$PRODUCT$fl_switch_2303-8sp1", "phoenixcontact$PRODUCT$fl_switch_2304-2gc-2sfp", "phoenixcontact$PRODUCT$fl_switch_2306-2sfp", "phoenixcontact$PRODUCT$fl_switch_2306-2sfp_pn", "phoenixcontact$PRODUCT$fl_switch_2308", "phoenixcontact$PRODUCT$fl_switch_2308_pn", "phoenixcontact$PRODUCT$fl_switch_2312-2gc-2sfp", "phoenixcontact$PRODUCT$fl_switch_2314-2sfp", "phoenixcontact$PRODUCT$fl_switch_2314-2sfp_pn", "phoenixcontact$PRODUCT$fl_switch_2316", "phoenixcontact$PRODUCT$fl_switch_2316/k1", "phoenixcontact$PRODUCT$fl_switch_2316_pn", "phoenixcontact$PRODUCT$fl_switch_2404-2tc-2sfx", "phoenixcontact$PRODUCT$fl_switch_2406-2sfx", "phoenixcontact$PRODUCT$fl_switch_2406-2sfx_pn", "phoenixcontact$PRODUCT$fl_switch_2408", "phoenixcontact$PRODUCT$fl_switch_2408_pn", "phoenixcontact$PRODUCT$fl_switch_2412-2tc-2sfx", "phoenixcontact$PRODUCT$fl_switch_2414-2sfx", "phoenixcontact$PRODUCT$fl_switch_2414-2sfx_pn", "phoenixcontact$PRODUCT$fl_switch_2416", "phoenixcontact$PRODUCT$fl_switch_2416_pn", "phoenixcontact$PRODUCT$fl_switch_2504-2gc-2sfp", "phoenixcontact$PRODUCT$fl_switch_2506-2sfp", "phoenixcontact$PRODUCT$fl_switch_2506-2sfp/k1", "phoenixcontact$PRODUCT$fl_switch_2506-2sfp_pn", "phoenixcontact$PRODUCT$fl_switch_2508", "phoenixcontact$PRODUCT$fl_switch_2508/k1", "phoenixcontact$PRODUCT$fl_switch_2508_pn", "phoenixcontact$PRODUCT$fl_switch_2512-2gc-2sfp", "phoenixcontact$PRODUCT$fl_switch_2514-2sfp", "phoenixcontact$PRODUCT$fl_switch_2514-2sfp_pn", "phoenixcontact$PRODUCT$fl_switch_2516", "phoenixcontact$PRODUCT$fl_switch_2516_pn", "phoenixcontact$PRODUCT$fl_switch_2608", "phoenixcontact$PRODUCT$fl_switch_2608_pn", "phoenixcontact$PRODUCT$fl_switch_2708", "phoenixcontact$PRODUCT$fl_switch_2708_pn", "phoenixcontact$PRODUCT$fl_switch_5916-8gc-4sfp+", "phoenixcontact$PRODUCT$fl_switch_5916sfp-8gc-4sfp+", "phoenixcontact$PRODUCT$fl_switch_5924-4gc", "phoenixcontact$PRODUCT$fl_switch_5924-4sfp+", "phoenixcontact$PRODUCT$fl_switch_5924sfp-4gc", "phoenixcontact$PRODUCT$fl_switch_tsn_2312-2gc-2sfp", "phoenixcontact$PRODUCT$fl_switch_tsn_2314-2sfp", "phoenixcontact$PRODUCT$fl_switch_tsn_2316"]}