# CVE-2026-91843

Unauthenticated stack overflow RCE to root in Check Point network products

- Page: https://www.vulneraibility.com/cve/CVE-2026-91843
- CVSS: 9.8
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.52% (percentile 44.1)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2026-09-18)
- CISA SSVC: exploitation none, automatable yes, technical impact total (assessed 2026-09-17)
- Weakness: CWE-121
- Published: 2026-09-16

## Affected versions

- checkpoint Quantum Security Management: affected R82.10 with Jumbo Hotfix Take 44 or below; R82 with Jumbo Hotfix Take 126 or below; R81.20 with Jumbo Hotfix Take 166 or below; R81.10 (EOS) with Jumbo Hotfix Take 190 or below; R81 (EOS); R80.40 (EOS); R80.30 (EOS); R80.20 (EOS); R80.10 (EOS); R80 (EOS)

A version outside these ranges is not a statement that it is unaffected.

## Impact

Unauthenticated remote code execution as root via login stack overflow; full system compromise, persistent access, and network pivoting.

## Action

Immediate action required

## Recommendation

Apply vendor patch immediately; isolate affected devices and restrict admin access.

## References

- [other] https://support.checkpoint.com/results/sk/sk1000155

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.