Unauthenticated service interruption via malformed HTTP requests
Published May 26, 2026 · Updated May 26, 2026
Heap-based buffer overflow in Check Point Quantum Security Gateway allows remote attackers to interrupt an HTTP-based service with malformed requests. Check Point identifies faulty HTTP request parsing and validation but has not disclosed the affected service, parser locus, or exact operation that overflows heap memory. No authentication or user interaction is required; the published impact is limited to service availability, and the interruption mode is undisclosed.
Summary
What happened
Heap-based buffer overflow in Check Point Quantum Security Gateway allows remote attackers to interrupt an HTTP-based service with malformed requests. Check Point identifies faulty HTTP request parsing and validation but has not disclosed the affected service, parser locus, or exact operation that overflows heap memory. No authentication or user interaction is required; the published impact is limited to service availability, and the interruption mode is undisclosed.
The record
- CVE
- CVE-2026-48135
- Published
- May 26, 2026
- Updated
- May 26, 2026
- Vendor
- Check Point Software Technologies Ltd.
- Product
- Quantum Security Gateway
- Classifications
- CWE-122, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 26, 2026CVE publishedPublication date reported by the CVE source.
- May 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=All releases from R81.10 and below
- Affected versionversion=R81.20 with Jumbo Hotfix Take 127 or below
- Affected versionversion=R82.10 with Jumbo Hotfix Take 6 or below
- Affected versionversion=R82 with Jumbo Hotfix Take 91 or below
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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