PatchTheCVECVE-2026-55400: CVE-2026-55400 is an integer underflow in Secure Access servers prior to version 14.57
CVE-2026-55400 is a medium-severity flaw (CVSS 6.5) affecting secure access. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
CVE-2026-55400 is an integer underflow in Secure Access servers prior to version 14.57. Attackers with an authenticated session can send specially crafted traffic to a server in a non-default configuration and cause a persistent denial of service.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 70%) |
| CISA exploited list | No |
| Weakness | CWE-190 |
| Published | 2026-08-13 |
| Last modified | 2026-10-24 |
Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-55400?
secure access: upgrade to 14.57. Exact commands for each OS are on this page.
Is CVE-2026-55400 being exploited?
CVE-2026-55400 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-55400 affect?
CVE-2026-55400 affects secure access. Severity is medium (CVSS 6.5). CVE-2026-55400 is an integer underflow in Secure Access servers prior to version 14.57. Attackers with an authenticated session can send specially crafted traffic to a server in a non-default configuration and cause a persistent denial o
How urgent is CVE-2026-55400?
Priority 30/100. No elevated risk signals yet.