CVE-2026-91843 Stack overflow in login process to the Security Management and Log Servers
An unauthenticated stack overflow in the login process allows remote attackers to execute arbitrary code with root privileges on Check Point Security Management servers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91843?
CVE-2026-91843 is a critical memory corruption vulnerability in checkpoint Quantum Security Management, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
Weakness: CWE-121
Which versions are affected by CVE-2026-91843?
How do I fix CVE-2026-91843?
No fix has been published for CVE-2026-91843 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-2026-91843 being exploited?
There is no known exploitation of CVE-2026-91843 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-9r37-4rp3-mw4w.