Check Point Quantum Security Gateway VPN Service heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Check Point Quantum Security Gateway. It has been classified as critical. This vulnerability affects unknown code of the component VPN Service. Performing a manipulation results in heap-based overflow. This vulnerability was named CVE-2026-48131. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in Check Point Quantum Security Gateway (unknown version). This affects an unknown code block of the component VPN Service. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on availability. The summary by CVE is:

The VPN service may mishandle an unexpected IKE fragment value received on the IKE port 500/UDP during the early stage of a connection attempt. This can cause the service to terminate unexpectedly, resulting in denial of service (temporary disruption of VPN-related functionality).

It is possible to read the advisory at support.checkpoint.com. This vulnerability is uniquely identified as CVE-2026-48131 since 05/20/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/29/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1726). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Check Point Security Gateway

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (checkpoint): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/20/2026 CVE reserved
05/26/2026 +6 days Advisory disclosed
05/26/2026 +0 days VulDB entry created
05/29/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: checkpoint.com

Advisory: support.checkpoint.com
Status: Confirmed

CVE: CVE-2026-48131 (🔒)
GCVE (CVE): GCVE-0-2026-48131
GCVE (VulDB): GCVE-100-365643
CERT Bund: WID-SEC-2026-1726 - Check Point Security Gateway: Mehrere Schwachstellen

Entryinfo

Created: 05/26/2026 17:17
Updated: 05/29/2026 11:11
Changes: 05/26/2026 17:17 (61), 05/29/2026 11:11 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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