CVE-2026-5303 Race condition in AXIS OS
A TOCTOU race condition in the ACAP framework allows privilege escalation if unsigned applications are enabled and a malicious app is installed.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-5303?
CVE-2026-5303 is a medium-severity vulnerability in AXIS OS, published on 11 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The ACAP framework contains a Time-of-Check to Time-of-Use (TOCTOU) race condition, which could potentially lead to privilege escalation. This vulnerability can only be exploited if the Axis device is configured to allow the installation of unsigned ACAP applications, and if an attacker convinces the victim to install a malicious ACAP application.
Weakness: CWE-367
Which versions are affected by CVE-2026-5303?
How do I fix CVE-2026-5303?
No fix has been published for CVE-2026-5303 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-5303 being exploited?
There is no known exploitation of CVE-2026-5303 in the wild and no public exploit code.
Sources
Also known as GHSA-h429-j7q3-6227.