CVE-2026-85102: CWE-295: Improper Certificate Validation. in checkpoint Quantum Security Gateway
Affects checkpoint Quantum Security GatewaySource CVE Database V5
- Exploitation
Actively exploited – in CISA KEV since 09/22/2026
- KEV deadline
- 09/25/2026 US federal agencies must patch by this date; a sensible deadline for everyone else.
- EPSS
- 54.2% chance of exploitation in 30 days – higher than 99% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat to do
CISA required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- support.checkpoint.com/results/sk/sk1000117 (opens in a new tab)
- cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (opens in a new tab)
- cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-85102 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| checkpointQuantum Security Gateway | Affected– | Fixed in– |
Description
Improper certificate trust validation during VPN negotiation in Check Point Quantum Security Gateway may allow an unauthenticated remote attacker to execute arbitrary code on the Gateway.