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VulnerabilityKnown exploited · ransomwareExploit likelihood 86%
Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability
CVE-2023-27997 · CISA KEV · June 13, 2023
Summary
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.
From CISA, quoted as published. Check the source before acting.
What to do
Apply updates per vendor instructions.
CISA required action, quoted.
Affected products
| Vendor | Product |
|---|---|
| Fortinet | FortiOS and FortiProxy SSL-VPN |
Why it's on these mode pages
- Maritime: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Fortinet (network and remote-access gear used in every mode, all modes) (matched by rule)
Change history
- November 9, 2026: First collected by Watch
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