VulnerabilityPublished 8 Jun 2026Updated 4 Aug 2026

CVE-2026-50751: checkpoint Quantum Security Gateway · Improper Authentication.

Affects checkpoint Quantum Security GatewaySource CVE Database V5

Exploited in the wild · used in ransomware campaigns · KEV due 11 Jun 2026 · public detection template (Nuclei) · 85% EPSS : apply the vendor's fix or mitigations to checkpoint Quantum Security Gateway now.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

9.3Critical

How severe the flaw is on the 0–10 CVSS scale.

KEV deadline: 11 Jun 2026 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
Ransomware: Used in ransomware campaigns
EPSS: 85.3% 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:C/C:H/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality: High
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

Disclosed: evidence found.
CVE published 8 Jun 2026
Detectable: evidence found.
nuclei template: Check Point IKEv1 Remote-Access VPN - Certificate Authentication Bypass
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: evidence found.
Listed in CISA KEV the same day as disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

CVE ID reserved
by Check Point Software Ltd.
7 Jun 202609:42 UTC, 25 hours before disclosure
CVE published
on cve.org
8 Jun 202611:07 UTC, t = 0
In Threat Radar
record ingested
8 Jun 202611:33 UTC, 27 minutes after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed · ransomware use known
8 Jun 2026, the same day as disclosure
KEV remediation due
US federal deadline
11 Jun 2026, 3 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Affected software

Product	Affected	Fixed in
checkpointQuantum Security Gateway	Affected R81.10, R81, and R80.40 – R82.10 with Jumbo Hotfix Take 19 or below 4 affected builds	Fixed in–
checkpointSpark Firewalls	Affected =R80.20.X, R81.10.X, and R82.00.X	Fixed in–

Description

CVE-2026-50751 is a critical vulnerability in Check Point Quantum Security Gateway involving improper authentication due to a logic flow weakness in Remote Access and Mobile Access certificate validation within the deprecated IKEv1 key exchange. This flaw allows an unauthenticated remote attacker to bypass user authentication and establish a remote VPN connection without a valid password. The vulnerability has a high CVSS score of 9.3 and is known to be exploited in the wild, including use in ransomware campaigns.

Impact

An unauthenticated remote attacker can bypass authentication mechanisms and gain unauthorized remote VPN access to the network, potentially leading to data confidentiality breaches and partial integrity loss. This access could facilitate further malicious activities within the affected network environment. The vulnerability does not impact availability directly but poses a significant risk to network security.

Mitigation

Since the vulnerability involves the deprecated IKEv1 key exchange, disabling or migrating away from IKEv1 in favor of more secure protocols (e.g., IKEv2) may mitigate risk. Organizations should consult Check Point's official advisories for updates and apply any available patches or configuration changes promptly. Monitor vendor communications for official fixes or temporary mitigations.

Nuclei detection templates

Check Point IKEv1 Remote-Access VPN - Certificate Authentication Bypasscritical (opens in a new tab)

Proofs of concept on GitHub

Public PoC repositories for CVE-2026-50751 (opens in a new tab)

Public tooling indexed from Metasploit Framework, Exploit-DB, ProjectDiscovery nuclei-templates and PoC-in-GitHub. Its existence raises the odds of exploitation; it does not confirm attacks.

CWE-287Improper Authentication (opens in a new tab)
Class weaknessLikelihood of exploit: HighOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design · Libraries or Frameworks
Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
OWASP Cheat Sheets
OWASP Authentication (opens in a new tab)
OWASP ASVS 4.0.3
V2.8.5 (opens in a new tab)
V2.8.4 (opens in a new tab)
V9.2.3 (opens in a new tab)
Attack patterns
Fake the Source of Data (opens in a new tab)
Utilizing REST's Trust in the System Resource to Obtain Sensitive Data (opens in a new tab)
Session Hijacking (opens in a new tab)
Token Impersonation (opens in a new tab)
Upload a Web Shell to a Web Server (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

Timeline

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Oct 2026, 04:52 UTC

Public exploits and detectiona Nuclei detection template, GitHub proofs of concept

WeaknessesCWE-287

Technical details

References

Community reviews

Related threats