CVE-2026-40958 Input validation error in Secure Access clients prior to 14.55
Attackers with control over the tunnel protocol can cause a non-persistent denial of service against Secure Access clients.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-40958?
CVE-2026-40958 is a low-severity denial of service vulnerability in Absolute Secure Access, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
CVE-2026-40958 is a input validation error in Secure Access clients prior to 14.55. Attackers with intimate knowledge of and total control over the tunnel protocol can create a non-persistent DoS against their client.
Weakness: CWE-20
Which versions are affected by CVE-2026-40958?
It affects 1 product.
Products include Absolute Secure Access.
How do I fix CVE-2026-40958?
No fix has been published for CVE-2026-40958 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-40958 being exploited?
There is no known exploitation of CVE-2026-40958 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-xgjm-4322-4ccq.