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CVE-2023-27997

CISA KEV

Published June 13, 2023 · Updated April 3, 2026

high
Official Description+

Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests.

Affected Products

VendorProduct
FortinetFortiOS and FortiProxy SSL-VPN

Patch Status

Patch by 2023-07-04

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2023-27997.