CVE-2026-85102: Check Point Multiple Products Improper Certificate Validation Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 22 Sep 2026, 13 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 54.1%
EPSS score, percentile 99 of all scored records
- How severe?
- 9.8 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
Required action (CISA), due 25 Sep 2026: 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.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected: 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
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
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.
CISA due date for this action: 25 September 2026.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://support.checkpoint.com/results/sk/sk1000117
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-85102
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | R82.10 with Jumbo Hotfix Take 43 or below |
| Affected | R82 with Jumbo Hotfix Take 125 or below |
| Affected | R81.20 with Jumbo Hotfix Take 165 or below |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
Check Point Security Gateway and Check Point Spark Firewall using Site to Site VPN or Remote Access VPN contain an improper certificate validation vulnerability which could allow an unauthenticated remote attacker to execute arbitrary code on the Gateway.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2026-85102 to its Known Exploited Vulnerabilities (KEV) catalog on 22 Sep 2026.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 25 Sep 2026.
- The CVE record was published on 9 Sep 2026, 13 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 54.1% (percentile 99), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
Improper Certificate Validation in Quantum Security Gateway
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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-295: Improper Certificate Validation.
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 9 Sep 2026 | CVE record published |
| 22 Sep 2026 | Added to CISA KEV |
| 23 Sep 2026 | CVE record last updated |
| 25 Sep 2026 | CISA due date for the required action |
References
More exploited Check Point vulnerabilities
- CVE-2026-93616: Check Point Multiple Products Path Traversal Vulnerability
- CVE-2026-16232: Check Point SmartConsole Improper Authentication Vulnerability
- CVE-2026-50751: Check Point Security Gateway Improper Authentication Vulnerability
- CVE-2024-24919: Check Point Quantum Security Gateways Information Disclosure Vulnerability