CVE-2026-66767: CWE-191: Integer Underflow in SAP_SE SAP NetWeaver Application Server for ABAP and ABAP Platform
Description
SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user's session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application.
CVSS v3.1
Score 7.7high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-66767 affects SAP NetWeaver Application Server for ABAP and ABAP Platform. An unauthenticated attacker can send a specially crafted packet that triggers reprocessing of a previously buffered user request. This behavior can potentially allow the attacker to hijack another user's session if precise timing conditions are met. The vulnerability is classified under CWE-191 and has a CVSS v3.1 score of 7.7, indicating high impact on confidentiality and integrity, and low impact on availability.
Potential Impact
Successful exploitation could result in high confidentiality and integrity impact by hijacking another user's session. Availability impact is low. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor SAP advisories for updates and apply any official patches once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-42j4-4hwf-257g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-66767"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9f9109acd9273b49ff2667
Added to database: 09/08/2026, 04:37:29 UTC
Last enriched: 09/08/2026, 05:37:11 UTC
Last updated: 10/22/2026, 01:15:25 UTC
Views: 49
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