CVE-2026-24640

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Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0.2 through 7.0.12 may allow a remote authenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands via crafted HTTP requests."}, {"lang": "es", "value": "Una vulnerabilidad de desbordamiento de b\u00fafer basado en pila [CWE-121] en Fortinet FortiWeb 8.0.0 a 8.0.2, FortiWeb 7.6.0 a 7.6.6, FortiWeb 7.4 todas las versiones, FortiWeb 7.2 todas las versiones, FortiWeb 7.0.2 a 7.0.12 puede permitir a un atacante remoto autenticado que pueda eludir la protecci\u00f3n de pila y ASLR ejecutar c\u00f3digo o comandos arbitrarios a trav\u00e9s de solicitudes HTTP manipuladas."}], "id": "CVE-2026-24640", "lastModified": "2026-11-06T16:18:00.360", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.7, "impactScore": 5.9, "source": "psirt@fortinet.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24640", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-10T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-03-10T18:18:28.470", "references": [{"source": "psirt@fortinet.com", "tags": ["Vendor Advisory"], "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-087"}], "sourceIdentifier": "psirt@fortinet.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "psirt@fortinet.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.0.2]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.6.0,7.6.6]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.4.0,7.4.12]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.2.0,7.2.12]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.0.2,7.0.12]"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "FortiWeb", "source": "cna", "vendor": "Fortinet"}, "product": "fortiweb", "vendor": "fortinet"}], "analysis": {"en": {"generated_at": "2026-04-16T03:49:47.975497+00:00", "value": {"mitigation_remediation": ["Upgrade FortiWeb to version 8.0.3 or later.", "If using the 7.x branch, upgrade to 7.6.7 or later.", "Until a patch is applied, block or tightly restrict external HTTP traffic that can reach the FortiWeb interfaces responsible for the vulnerable code path by using network segmentation or firewall rules."], "summary": {"action": "Patch Immediately", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Fortinet FortiWeb appliances running version 8.0.0 through 8.0.2, 7.6.0 through 7.6.6, all 7.4 releases, all 7.2 releases, and 7.0.2 through 7.0.12. Any production or test environment with those firmware versions is susceptible.", "description_and_impact": "Fortinet FortiWeb is vulnerable to a stack\u2011based buffer overflow (CWE\u2011121) and an out\u2011of\u2011bounds write (CWE\u2011787). The flaw allows a remote authenticated attacker who can bypass stack protection and ASLR to send crafted HTTP requests that will execute arbitrary code or commands. The potential impact is full compromise of the device, leading to a loss of confidentiality, integrity, and availability for any network services protected by that FortiWeb instance.", "risk_and_exploitability": "The CVSS score is 5.9, indicating moderate severity. The EPSS score is less than 1%, showing a very low probability of exploitation in the general population. The vulnerability is not listed in the CISA KEV catalog. Attackers must be authenticated but can then bypass security controls; the likely vector is through maliciously crafted HTTP traffic sent to the Web application firewall over the network. Exploitation would require the attacker to have necessary privileges to log into the device and then send the crafted requests."}}}}, "created": "2026-03-11T11:49:12.005930+00:00", "title": "Stack Buffer Overflow in FortiWeb Allows Remote Code Execution via Crafted HTTP Requests", "updated": "2026-04-16T04:00:09.437771+00:00", "vendors": ["fortinet", "fortinet$PRODUCT$fortiweb"]}