Unauthenticated root code execution via login stack overflow
Published Sep 16, 2026 · Updated Sep 16, 2026
A stack overflow in affected Check Point Quantum Security Management builds allows remote attackers to execute code as root during login. Check Point has not publicly identified the login handler or disclosed which attacker-controlled field exceeds its stack buffer. The flaw is reachable before authentication and affects R80 through R81, R81.10 through Take 190, R81.20 through Take 166, R82 through Take 126, and R82.10 through Take 44.
Summary
What happened
A stack overflow in affected Check Point Quantum Security Management builds allows remote attackers to execute code as root during login. Check Point has not publicly identified the login handler or disclosed which attacker-controlled field exceeds its stack buffer. The flaw is reachable before authentication and affects R80 through R81, R81.10 through Take 190, R81.20 through Take 166, R82 through Take 126, and R82.10 through Take 44.
The record
- CVE
- CVE-2026-91843
- Published
- Sep 16, 2026
- Updated
- Sep 16, 2026
- Vendor
- Check Point Software Technologies Ltd.
- Product
- Quantum Security Management
- Classifications
- T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 16, 2026CVE publishedPublication date reported by the CVE source.
- Sep 16, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=R80.10 (EOS)
- Affected versionversion=R80.20 (EOS)
- Affected versionversion=R80.30 (EOS)
- Affected versionversion=R80.40 (EOS)
- Affected versionversion=R80 (EOS)
- Affected versionversion=R81.10 (EOS) with Jumbo Hotfix Take 190 or below
- Affected versionversion=R81.20 with Jumbo Hotfix Take 166 or below
- Affected versionversion=R81 (EOS)
- Affected versionversion=R82.10 with Jumbo Hotfix Take 44 or below
- Affected versionversion=R82 with Jumbo Hotfix Take 126 or below
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo