{"id":"CVE-2023-27997","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-27997","generatedAt":"2026-10-31T11:46:11.227Z","title":"Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability","description":"A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.","published":"2023-06-13T09:15:17.000Z","lastModified":"2026-07-31T04:16:44.000Z","status":"Analyzed","sourceIdentifier":"psirt@fortinet.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-122","CWE-787"],"affected":["fortinet/fortiproxy","fortinet/fortios"],"epss":{"score":0.85689,"percentile":0.99725,"date":"2026-10-30","history":[]},"kev":{"listed":true,"dateAdded":"2023-06-13","dueDate":"2023-07-04","knownRansomwareCampaignUse":"Known","notes":"Apply updates per vendor instructions.\nhttps://www.fortiguard.com/psirt/FG-IR-23-097;  https://nvd.nist.gov/vuln/detail/CVE-2023-27997"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 4 July 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"https://fortiguard.com/psirt/FG-IR-23-097","tags":["Vendor Advisory"],"source":"psirt@fortinet.com"},{"url":"https://fortiguard.com/psirt/FG-IR-23-097","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27997","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-27997","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}