CVE-2026-2521

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Executing a manipulation can lead to memory corruption. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet."}, {"lang": "es", "value": "Se ha identificado una debilidad en Open5GS hasta la versi\u00f3n 2.7.6. Este problema afecta a la funci\u00f3n sgwc_s5c_handle_create_session_response del componente SGW-C. La ejecuci\u00f3n de una manipulaci\u00f3n puede llevar a corrupci\u00f3n de memoria. El ataque puede realizarse de forma remota. El exploit se ha puesto a disposici\u00f3n del p\u00fablico y podr\u00eda utilizarse para ataques. El proyecto fue informado del problema con antelaci\u00f3n a trav\u00e9s de un informe de problema, pero a\u00fan no ha respondido."}], "id": "CVE-2026-2521", "lastModified": "2026-06-17T10:31:13.900", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2521", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-17T17:22:35.194626Z", "version": "2.0.3"}}]}, "published": "2026-02-15T23:16:05.803", "references": [{"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://github.com/open5gs/open5gs/"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/open5gs/open5gs/issues/4282"}, {"source": "cna@vuldb.com", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://github.com/open5gs/open5gs/issues/4282#issue-3807902188"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.346109"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.346109"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.738334"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.7.6"}}], "product": "open5gs", "vendor": "open5gs"}], "analysis": {"en": {"generated_at": "2026-04-17T19:18:46.627330+00:00", "value": {"mitigation_remediation": ["Upgrade Open5GS to a version that incorporates the reported fix, or apply any official vendor patch once released.", "If an upgrade is not immediately possible, restrict external access to the SGW\u2011C interfaces and enforce strict authentication to limit potential attackers.", "Implement runtime monitoring of SGW\u2011C logs for anomalous Create Session Response handling and set up alerts for unexpected memory failure patterns.", "Apply general memory protection practices such as enabling stack canaries, address space layout randomization (ASLR), and bounds checking in the Build configuration if the source is available."], "summary": {"action": "Immediate Patching", "impact": "Memory Corruption via Remote Session Response"}, "threat_synthesis": {"affected_systems": "The affected software is Open5GS, specifically the SGW\u2011C module in releases up to and including 2.7.6. No other vendors or product versions are mentioned. The CVE notes that the issue is present in all 2.7.x versions processed by this function.", "description_and_impact": "A buffer overflow vulnerability exists in the SGW\u2011C component of Open5GS up to version 2.7.6, linked to the sgwc_s5c_handle_create_session_response function. This flaw can corrupt memory when the function processes crafted Create Session Response messages, potentially allowing an attacker to compromise the server process. The documented weakness is a classic out\u2011of\u2011bounds write (CWE\u2011119).", "risk_and_exploitability": "The CVSS base score of 6.9 indicates moderate severity; the EPSS score is <1%, suggesting low but non\u2011zero likelihood of exploitation. Public proof\u2011of\u2011concept code is available, and the vulnerability can be triggered remotely, meaning that an attacker only needs network access to the SGW\u2011C interface. Because the exploit can corrupt memory, it can lead to loss of confidentiality, integrity, or availability of the SGW\u2011C process, and potentially escalation to other network elements."}}}}, "created": "2026-02-16T09:42:44.590981+00:00", "updated": "2026-04-17T19:30:15.630343+00:00", "vendors": ["open5gs", "open5gs$PRODUCT$open5gs"]}