Medium5.9Fortinet Updated
Pre-authentication Denial of Service attack in OpenSSH - CVE-2025-26466
FG-IR-25-122 Published Mar 11, 2025Updated by vendor May 25, 2026
CVE-2025-26466
Affected products & platforms
FortinetUnclassified
Summary
CVSSv3 Score: 5.9 CVE-2025-26466A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished.
Affected versions
- FortiADC 7.6: 7.6.1
- FortiADCManager 7.6: 7.6.0
- FortiAIOps 2.1: 2.1 all versions
- FortiAIOps 2.0: 2.0.1 through 2.0.2
- FortiAnalyzer 7.6: 7.6.0 through 7.6.2
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Fixed versions
- FortiADC 7.6: 7.6.2
- FortiADCManager 7.6: 7.6.1
- FortiAIOps 2.1: migrate to a fixed release
- FortiAIOps 2.0: migrate to a fixed release
- FortiAnalyzer 7.6: 7.6.3
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Upgrade per the Affected/Solution table: FortiADC 7.6: 7.6.2; FortiADCManager 7.6: 7.6.1; FortiAIOps 2.1: migrate to a fixed release; FortiAIOps 2.0: migrate to a fixed release; FortiAnalyzer 7.6: 7.6.3.
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.