Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1
Priority MEDIUM 42CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-295.
Summary
A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04727 91st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Check Point | Quantum Security Gateway | R82.10 with Jumbo Hotfix Take 19 or below; R82 with Jumbo Hotfix Take 103 or below; R81.20 with Jumbo Hotfix Take 141 or below; R81.10, R81, and R80.40 | — | No fix listed | CNA |
| Check Point | Spark Firewalls | R80.20.X, R81.10.X, and R82.00.X | — | No fix listed | CNA |
- Quantum Security Gateway VendorCheck Point Affected R82.10 with Jumbo Hotfix Take 19 or below; R82 with Jumbo Hotfix Take 103 or below; R81.20 with Jumbo Hotfix Take 141 or below; R81.10, R81, and R80.40 Fixed in — No fix listed CNA
- Spark Firewalls VendorCheck Point Affected R80.20.X, R81.10.X, and R82.00.X Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-50752
- 2026-10-03 Alias added: GHSA-89xv-5cj4-39m4
- 2026-10-25 EPSS moved to the 90th–95th percentile
- 2026-10-25 Priority changed: LOW → MEDIUM
References
More Check Point vulnerabilities
- TI-2026-63071 Directory Traversal and File upload allows execution of arbitrary script on the Management Server KEVCVSS 3.1CRITICAL 9.8
- TI-2026-58455 Improper Certificate Validation in Quantum Security Gateway KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
- TI-2026-37414 User Authentication Bypass in VPN Remote Access and Mobile Access KEVCVSS 3.1CRITICAL 9.3
- TI-2026-13573 Authentication Bypass in the SmartConsole Login Process Using an Application Token KEVCVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-50752 · CVE Program
- CVE-2026-50752 · NVD
- FIRST EPSS
- GHSA-89xv-5cj4-39m4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences