CVE-2026-91843
Published on September 16, 2026
Stack overflow in login process to the Security Management and Log Servers
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
Vulnerability Analysis
CVE-2026-91843 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-91843 has been classified to as a Stack Overflow vulnerability or weakness.
Affected Versions
checkpoint Quantum Security Management:- Version R82.10 with Jumbo Hotfix Take 44 or below is affected.
- Version R82 with Jumbo Hotfix Take 126 or below is affected.
- Version R81.20 with Jumbo Hotfix Take 166 or below is affected.
- Version R81.10 (EOS) with Jumbo Hotfix Take 190 or below is affected.
- Version R81 (EOS) is affected.
- Version R80.40 (EOS) is affected.
- Version R80.30 (EOS) is affected.
- Version R80.20 (EOS) is affected.
- Version R80.10 (EOS) is affected.
- Version R80 (EOS) is affected.