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CVE-2026-50752

Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1

No known exploitation. EPSS puts it in the 17th percentile. A vendor fix is available.

CVSS 3.17.4HighEPSS percentile17th0.3% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFixVendor fixNo build named by the sources

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

  • checkpoint Quantum Security GatewayAffected: R82.10 with Jumbo Hotfix Take 19 or belowUpgrade to: not statedAffected: R82 with Jumbo Hotfix Take 103 or belowUpgrade to: not statedAffected: R81.20 with Jumbo Hotfix Take 141 or belowUpgrade to: not statedAffected: R81.10, R81, and R80.40Upgrade to: not statedStated by: CVE record
  • checkpoint Spark FirewallsAffected: R80.20.X, R81.10.X, and R82.00.XUpgrade to: not statedStated by: CVE record
  • Check Point Software Technologies Ltd. Security GatewaysAffected: до R82.10 Jumbo Hotfix Take 19Upgrade to: not statedStated by: BDU
  • Check Point Software Technologies Ltd. Spark FirewallAffected: R80.20.X (EOS)Upgrade to: not statedStated by: BDU

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

7 publishers

  1. Technical analysis published

    ·Kaspersky Securelist summary

  2. Exploitation reported in the wild

    ·Хакер (xakep.ru)

Sourced from public security reporting — each date is when it was published, not when it happened. 1 further article named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS17th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.3% chance of exploitation activity in the next 30 days, which ranks it in the 17th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

9 events over 46 days, from the signal feeds we watch.

  1. Analysis publishedCheck Point VPN: the IKEv1 flaw that lets attackers log in with no password (CVE-2026-50751)
  2. Patch availablerecord updated
  3. OpenVAS check added
  4. Patch availablepublished, weakness classified, att&ck mapped, record updated

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Scored 7.4 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability NoneNo availability impact

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 1 more reference. See all after sign-in

Analysis on the cve.tools blog

In the news

Watch the software you run.

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We'll flag the next CVE, public exploit or patch for Quantum Security Gateway, not every advisory.