CVE-2026-50751: Check Point Security Gateway

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

Yes, if you run Check Point Security Gateway. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-06-08, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-06-11; treat that as the outer limit, not the target. CISA also lists it as known to be used in ransomware campaigns.
EPSS 85.3%, percentile 99.7: FIRST’s model estimates a 85.3% chance of exploitation activity in the next 30 days, higher than 99.7% of all scored CVEs (very high). EPSS is a probability, not a verdict.
Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

What it is

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.

CISA’s summary

Check Point Security Gateway contains an improper authentication vulnerability in IKEv1 key exchange that could allow an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password.

Weakness type: CWE-287.

Product: Check Point Security Gateway · Assigned by: checkpoint · Published: 2026-06-08

Affected and fixed versions

Vendor	Product	Affected versions (per CVE record)
checkpoint	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
checkpoint	Spark Firewalls	R80.20.X, R81.10.X, and R82.00.X

Severity scores

Scored by	CVSS	Score	Vector
CISA-ADP	3.1	9.3 Critical	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N`

Attack vector: network (remotely reachable)
Attack complexity: low
Privileges required: none (no login)
User interaction: none
Scope: changed (can affect other components)

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

CISA KEV: added 2026-06-08; federal due date 2026-06-11. Known ransomware use: Known.
CISA 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.
CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
FIRST EPSS (model of 2026-10-21): 85.34% probability of exploitation activity in the next 30 days; percentile 99.7.

Timeline

2026-06-08 — Added to CISA’s Known Exploited Vulnerabilities catalog
2026-06-08 — CVE record published by checkpoint
2026-06-11 — CISA remediation deadline for US federal agencies
2026-08-04 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Other references from the CVE record and advisory

support.checkpoint.com support.checkpoint.com

All exploited Check Point vulnerabilities · Today’s Security Digest