What is CVE-2026-40949?

CVE-2026-40949 is a medium-severity vulnerability in Absolute Secure Access, classified under Stack-based Buffer Overflow. CVSS score: 4.4/10. Published 2026-04-30.

How severe is CVE-2026-40949?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Buffer overflow in Absolute Secure Access

CVE-2026-40949

CVE-2026-40949 is a buffer overflow vulnerability in the Secure Access Windows client prior to 14.50. Attackers with local control of the Windows client can use it to trigger a denial of service.

Vulnerability class: Buffer Overflow

Published 2026-04-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.9th percentile), scored 2026-09-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Absolute Secure Access
Absolute Software Secure Access — versions 0
Microsoft Windows

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-4… (Vendor Advisory)

Frequently asked questions

What is CVE-2026-40949?: CVE-2026-40949 is a medium-severity vulnerability in Absolute Secure Access, classified under Stack-based Buffer Overflow. CVSS score: 4.4/10. Published 2026-04-30.
How severe is CVE-2026-40949?: Medium severity. CVSS v3 base score is 4.4 out of 10.