CVE-2026-91843
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-91843- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
EUVDEUVD-2026-80699
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
- Record
EUVD-2026-80699- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9r37-4rp3-mw4w
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary...
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
- Record
GHSA-9r37-4rp3-mw4w- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
NVD
A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.
- Record
CVE-2026-91843- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-121
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | HORKimhab/CVE-2026-91843 | 2026-09-18 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-91843 is a critical vulnerability (CVSS 9.8) in Checkpoint Quantum Security Management, published September 16, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.52%, the 44th percentile. No source names a fixed version.