What is CVE-2026-55400?

CVE-2026-55400 is a medium-severity vulnerability in Absolute Secure Access, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-08-13.

How severe is CVE-2026-55400?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Integer overflow in Absolute Secure Access

CVE-2026-55400

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.

Vulnerability class: Integer Overflow

Published 2026-08-13 · last modified 2026-09-04.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.3th percentile), scored 2026-09-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

Absolute Secure Access
Absolute Security Secure Access — versions 0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-5… (Vendor Advisory)

Frequently asked questions

What is CVE-2026-55400?: CVE-2026-55400 is a medium-severity vulnerability in Absolute Secure Access, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-55400?: Medium severity. CVSS v3 base score is 6.5 out of 10.