CVE-2026-40949 Buffer overflow in Windows clients prior to 14.50
Local attackers can trigger a buffer overflow in the Secure Access Windows client, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40949?
CVE-2026-40949 is a medium-severity memory corruption vulnerability in Absolute Secure Access, published on 30 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-121
Which versions are affected by CVE-2026-40949?
It affects 1 product.
Products include Absolute Secure Access.
How do I fix CVE-2026-40949?
No fix has been published for CVE-2026-40949 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-40949 being exploited?
There is no known exploitation of CVE-2026-40949 in the wild and no public exploit code.
Other vulnerabilities in Absolute Secure Access
- CVE-2026-55402 Denial of service in Secure Access
- CVE-2026-33445 Memory management vulnerability in Secure Access servers
- CVE-2025-49080 Memory management vulnerability in Absolute Secure Access server versions 9.0 to 13.54
- CVE-2026-40952 Privilge misconfiguration in Secure Access installers
- CVE-2026-33451 Arbitrary read/write vulnerability in Windows clients prior to 14.50
Sources
Also known as GHSA-xg64-r9fm-3hrf.