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CVE-2026-48131— VPND IKE Fragment Reassembly - Heap Out-of-Bounds Write via Sequence Number Zero

Quick assessment

Affected
checkpoint Quantum Security Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Check Point Quantum Security Gateway是以色列Check Point公司的一系列企业级安全网关设备。 Check Point Quantum Security Gateway存在安全漏洞，该漏洞源于VPN服务在连接尝试早期阶段对IKE端口500/UDP接收的意外IKE片段值处理不当，可能导致服务意外终止，造成拒绝服务。

CVSS 8.1 · High EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 4

VendorProduct Version RangeStatus
checkpoint Quantum Security Gateway R82.10 with Jumbo Hotfix Take 6 or below affected
R82 with Jumbo Hotfix Take 91 or below affected
R81.20 with Jumbo Hotfix Take 127 or below affected
All releases from R81.10 and below affected
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I. Basic Information for CVE-2026-48131

Vulnerability Information
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Vulnerability Title
VPND IKE Fragment Reassembly - Heap Out-of-Bounds Write via Sequence Number Zero
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Check Point Quantum Security Gateway 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Check Point Quantum Security Gateway是以色列Check Point公司的一系列企业级安全网关设备。 Check Point Quantum Security Gateway存在安全漏洞，该漏洞源于VPN服务在连接尝试早期阶段对IKE端口500/UDP接收的意外IKE片段值处理不当，可能导致服务意外终止，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
checkpoint Quantum Security Gateway R82.10 with Jumbo Hotfix Take 6 or below -

II. Public POCs for CVE-2026-48131

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III. Intelligence Information for CVE-2026-48131

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Vendor Advisories for CVE-2026-48131 (1)

Same Patch Batch · checkpoint · 2026-05-26 · 6 CVEs total

CVE-2026-48132 8.1 HIGH VPN service may restart unexpectedly when processing IKE traffic over NAT-T 4500/UDP
CVE-2026-48133 7.5 HIGH Identity Awareness Captive Portal - Unauthenticated Local File Inclusion
CVE-2026-48134 5.6 MEDIUM SQL injection issue in UserCheck Portal when DLP Software Blade is active
CVE-2026-48135 5.3 MEDIUM HTTP service can incorrectly process malformed HTTP requests
CVE-2026-48136 4.1 MEDIUM Authenticated Administrator Role-Based Access Control Bypass in Compliance

IV. Related Vulnerabilities

Same product: Quantum Security Gateway
Same vendor: checkpoint
Same weakness: CWE-122

V. Comments for CVE-2026-48131

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