What is CVE-2026-40953?

CVE-2026-40953 is a medium-severity vulnerability in Absolute Secure Access, classified under Out-of-bounds Write. CVSS score: 4.4/10. Published 2026-07-15.

How severe is CVE-2026-40953?

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

Buffer overflow in Absolute Secure Access

CVE-2026-40953

CVE-2026-40953 is a heap overflow in the certificate parsing function of Secure Access clients prior to 14.55. Attackers with local access and administrator permissions can create a denial of service attack against the client over which they have control.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (0.8th percentile) — read the EPSS interpretation.

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.

Affected products

Absolute Secure_access
Absolute Security Secure Access — versions 0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

SecurityResponse@netmotionsoftware.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-40953?: CVE-2026-40953 is a medium-severity vulnerability in Absolute Secure Access, classified under Out-of-bounds Write. CVSS score: 4.4/10. Published 2026-07-15.
How severe is CVE-2026-40953?: Medium severity. CVSS v3 base score is 4.4 out of 10.