Vulnerability report

Trusted Third Party Report Confirmed Confidence In CISA KEV

CVE-2026-123039

Quantum Security Gateway Privilege Escalation

Check Point / Quantum Security Gateway · R82.10 with Jumbo Hotfix Take 50 or below

Watch CVE-2026-123039 Browse KEV feed
Severity
CVSS 7.8 · High
Confidence
Confirmed
Exploit status
Trusted Third Party Report
EPSS
1.3%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-123039 is a vulnerability affecting Check Point Quantum Security Gateway, Quantum Security Management.

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

Check Point / Quantum Security Gateway and Quantum Security Management, including R82.10 with Jumbo Hotfix Take 50 or below, R82.20 with Jumbo Hotfix Take 10 or below, and R82 with Jumbo Hotfix Take 130 or below.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Quantum Security Gateway Privilege Escalation

The Gaia OS DynamicCLI daemon runs as root and listens on a world-writable local socket (/tmp/dynamic_socket) without authenticating connecting processes.

An authenticated local user can send a command to the socket and have it executed as root.

checkpoint Affected
Quantum Security Gateway
R82.10 with Jumbo Hotfix Take 50 or below R82.20 with Jumbo Hotfix Take 10 or below R82 with Jumbo Hotfix Take 130 or below R81.20 with Jumbo Hotfix Take 173 or below
checkpoint Affected
Quantum Security Management
R82.10 with Jumbo Hotfix Take 50 or below R82.20 with Jumbo Hotfix Take 10 or below R82 with Jumbo Hotfix Take 130 or below R81.20 with Jumbo Hotfix Take 173 or below
Published
12 Nov 2026
Exploitation Attempts Reported
12 Nov 2026
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None

Tags

cisa

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation Attempts Observed in the Wild

Check Point Blog

Recorded 12 Nov 2026

A trusted third party reported exploitation attempts.

Proof of concept available

GitHub

Recorded 13 Nov 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
Check Point Blog First 2026-11-12 14:23 UTC
CISA 2026-11-13 18:01 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.8 High

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

1.3%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Incorrect Permission Assignment for Critical Resource CWE-732 Missing Authorization CWE-862

Recent mention · Security Affairs

Unpatched Check Point Gateways Are Being Wiped exploiting PHP2Shell

Unpatched Check Point gateways were hacked worldwide, leading to root access, backdoors, network intrusion and destructive wiper attacks. Starting on 30 October, an attacker scanned and exploited Check Point Security Gateways that hadn’t been patched, going in through the...

Read full advisory

All Mentions

Recent mention · Security Affairs

Unpatched Check Point Gateways Are Being Wiped exploiting PHP2Shell

Security Affairs · 13 Nov 2026

Unpatched Check Point gateways were hacked worldwide, leading to root access, backdoors, network intrusion and destructive wiper attacks. Starting on 30 October, an attacker scanned and exploited Check Point Security Gateways that hadn’t been patched, going in through the Mobile Access portal. Check Point Research describes the activity as PHP2Shell for initial access, followed by […]

Recent mention · The Hacker News

Hackers Exploit PHP2Shell Flaws in Check Point Gateways to Deploy TSGA Backdoor and Wipe ESXi Files

The Hacker News · 13 Nov 2026

Ravie LakshmananNov 13, 2026Vulnerability / Cyber Espionage An unknown threat actor has been observed targeting unpatched Check Point Security Gateways to obtain initial access via the PHP2Shell vulnerabilities and then a previously reported local privilege escalation flaw in Gaia OS to deploy a backdoor called TSGA. The activity, detailed by Check Point, began on October 30, 2026, and targeted Israeli organizations, with a broader follow-up wave on November 2, 2026, that targeted organizations across multiple countries and sectors. Some of the organizations singled out in the first wave...

Recent mention · Check Point Blog

Security Advisory: Active Exploitation of PHP2Shell and Local Privilege Escalation

Check Point Blog · 12 Nov 2026

Check Point Research has identified active, in-the-wild exploitation of PHP2Shell, a vulnerability in PHP that also affects Check Point Security Gateways. In the observed incidents, the attacker exploited PHP2Shell to gain initial access, then used a local privilege escalation vulnerability to obtain root privileges and establish persistence. Security fixes for Check Point Security Gateway and Management were available one week before the attack, on October 23rd. Only a couple of dozen unpatched systems, in a single region, were compromised in the observed incidents. Affected customers were...

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

googlesky/CVE-2026-123039

github · Created 2026-11-13 03:22:26 UTC · 0 stars · AI assessment 84%

Containerised PoC for CVE-2026-123039: the Check Point Gaia OS Dynamic CLI daemon publishes /tmp/dynamic_socket world-writable and authenticates no caller, so any local user escalates to root. Differential lab (affected vs patched), 4-mode PoC, 0day sweep.

Timeline

From disclosure to observed exploitation attempts

  1. 18:01 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. 03:22 UTC

    Public PoC available

    Public proof-of-concept code published

  3. 14:23 UTC

    Added to Previdian KEV Feed

    High-confidence, third-party report of exploitation attempts

  4. 14:02 UTC

    CVE published

    Vulnerability disclosed publicly

  5. 07:30 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-123039

Sample API response 
{
  "cve_id": "CVE-2026-123039",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.01274,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}