CVE-2026-50751 kev+ ransomware in the critical feed json
User Authentication Bypass in VPN Remote Access and Mobile Access
published 2026-06-08 5 mo ago modified 2026-08-04 3 mo ago also EUVD-2026-35047
- cvss
- 9.3
- version 3.1, CNA
- cisa kev
- Exploited
- added 2026-06-08, used in ransomware
- epss
- 85.3%
- EPSS 85.3% chance of exploitation in 30 days, percentile 99.7%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password.
Patch / fix
cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- checkpoint gaia_os r81.20
- checkpoint gaia_embedded r81.10.17, r82.00.10
Timeline
- CISA SSVC: exploitation active
- Added to CISA KEV
- Published
- CISA patch deadline
Known exploited
- Added
- 5 mo ago
- Patch by
- 2026-06-11 (4 mo ago)
- Ransomware
- Known to be used in ransomware campaigns
- Required action
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Vendor, product
- Check Point, Security Gateway
- CISA name
- Check Point Security Gateway Improper Authentication Vulnerability
Ransomware
Groups reported to have exploited it in intrusions.
- Qilin ransomware gang
reported by blog.checkpoint.com
Ransomware Vulnerability Matrix by BushidoUK (github.com/BushidoUK/Ransomware-Vulnerability-Matrix), reformatted per CVE. CC BY 4.0
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
85.35% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Check Point IKEv1 Remote-Access VPN - Certificate Authentication Bypass nuclei detection template
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
Affected products
- checkpoint Quantum Security Gateway
- checkpoint Spark Firewalls
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
support.checkpoint.com
/results/sk/sk185033
mitigation, patch, vendor-advisory
-
blog.checkpoint.com
/security/check-point-releases-important-hotfix-for-vulnerabilities-in-deprecated-ikev1-vpn-protocol/
vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-50751
government-resource, us-government-resource
Sources
- CVE List CVE-2026-50751
- NVD CVE-2026-50751
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.