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Check Point Quantum CVE-2026-85103

| EUVDEUVD-2026-75010 CRITICAL
Heap-based Buffer Overflow (CWE-122)
2026-09-09 cve@checkpoint.com GHSA-g4cm-76f6-qvmc
9.8
CVSS 3.1 · Vendor: checkpoint
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Severity by source

Vendor (checkpoint) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
ENISA EUVD
CRITICAL
qualitative
vuln.today AI
9.8 CRITICAL

Unauthenticated, network-reachable overflow in the VPN certificate parser with no user interaction, yielding code execution on the appliance, so full C/I/A impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (checkpoint).

CVSS VectorVendor: checkpoint

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

Lifecycle Timeline

3
POC Analysis Generated
Sep 12, 2026 - 19:20 vuln.today
Analysis Generated
Sep 09, 2026 - 13:36 vuln.today
CVE Published
Sep 09, 2026 - 13:20 cve.org
CRITICAL 9.8

DescriptionCVE.org

A heap-based buffer overflow in VPN certificate ASN.1 decoding may allow an unauthenticated remote attacker to execute arbitrary code on Check Point Quantum Security Management and Quantum Security Gateway systems.

AnalysisAI

Remote code execution in Check Point Quantum Security Gateway and Quantum Security Management stems from a heap-based buffer overflow in the ASN.1 decoder that parses VPN certificates, reachable by unauthenticated remote attackers. Because the flaw sits in the certificate-handling path of the internet-facing VPN service, a single crafted certificate or handshake can overflow heap memory and execute attacker-controlled code on security appliances that sit at the network perimeter. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target expose the VPN certificate-handling path - i.e., a Quantum Security Gateway running IKE/VPN services that accept and decode certificates, or a reachable Quantum Security Management instance - to the attacker's network position. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, 9.8) describes the worst-case signal set: remote, low-complexity, no authentication, no user interaction, full confidentiality/integrity/availability impact - consistent with a pre-auth overflow in an internet-facing VPN parser. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the fix referenced in Check Point advisory sk1000118 (https://support.checkpoint.com/results/sk/sk1000118) - typically delivered as a jumbo hotfix take or version upgrade for the affected Gaia/Quantum releases; the input does not contain an exact fixed version, so treat the SK as the authoritative patch source (Patch available per vendor advisory; exact version not provided in input). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all Check Point Quantum Gateway and Management appliances currently deployed, identify which versions are in use, and determine which systems expose VPN endpoints to untrusted networks. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-85103 vulnerability details – vuln.today

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