Critical [CVE-2026-50751] User Authentication Bypass in VPN Remote Access and Mobile Access
This critical-severity Check Point advisory covers CVE-2026-50751 affecting Quantum Security Gateway, Spark Firewalls.
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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.
Affected products named by the advisory: Quantum Security Gateway; Spark Firewalls.
CISA Known Exploited Vulnerability
- Listed:
- Jun 8, 2026 · federal remediation due Jun 11, 2026
- 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.
- Ransomware use:
- Known
KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.
- Quantum Security Gateway R82.10 with Jumbo Hotfix Take 19 or below
- Quantum Security Gateway R82 with Jumbo Hotfix Take 103 or below
- Quantum Security Gateway R81.20 with Jumbo Hotfix Take 141 or below
- Quantum Security Gateway R81.10, R81, and R80.40
- Spark Firewalls R80.20.X, R81.10.X, and R82.00.X
Official advisory · high-confidence parse· fetched 22 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 22 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 22 days ago·verify at source
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