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Report · Bleeping ComputerAbout CVE-2026-91843Published

New Check Point flaw lets hackers execute code with root privileges

Source Bleeping Computer

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Authoritative record:CVE-2026-91843· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
checkpointQuantum Security ManagementAffected
  • R80 (EOS) – R82.10 with Jumbo Hotfix Take 44 or below
10 affected builds
Fixed in–

AI-suggested

Check Point has released official security updates to fix this vulnerability. Customers unable to immediately apply patches can implement temporary mitigations by hardening vulnerable systems and restricting access to trusted IP addresses or subnets via the SmartConsole dashboard under Manage & Settings > Permissions & Administrators > Trusted Clients. Monitoring audit and admin login logs for 'Administrator failed to log in: Username too long' alerts can help detect exploitation attempts. Applying the vendor's LivePatch or full security update is strongly recommended to fully remediate the issue.

Description

A critical stack-based buffer overflow vulnerability (CVE-2026-91843) in Check Point Security Management Server and Log Server allows unauthenticated attackers to execute code with root privileges remotely. The flaw affects all Security Management Server deployments regardless of configuration and does not require user interaction. Check Point has released security updates to address this issue and provided temporary mitigations including system hardening and restricting access to trusted IPs. No active exploitation has been reported yet, but detection is possible via specific login failure alerts.

References

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