Insecure Deserialization vulnerability in SAP NetWeaver (JMS service)
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.
Summary
Due to a Deserialization vulnerability in SAP NetWeaver (JMS service), an attacker authenticated as an administrator with local access could submit specially crafted content to the server. If processed by the application, this content could trigger unintended behavior during internal logic execution, potentially causing a denial of service. Successful exploitation results in a high impact on availability, while confidentiality and integrity remain unaffected.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-23685
- 2026-10-03 Alias added: GHSA-ccw7-5mwj-q9wj
References
Advisory 1
More SAP Netweaver vulnerabilities
- TI-2025-22522 Missing Authorization check in SAP NetWeaver (Visual Composer development server) KEVCVSS 3.1CRITICAL 10.0
- TI-2021-15842 Path traversal in SAP NetWeaver KEVCVSS 3.1CRITICAL 9.9
- TI-2025-27866 Insecure Deserialization in SAP NetWeaver (Visual Composer development server) KEVCVSS 3.1CRITICAL 9.1
- TI-2012-02262 The DiagTraceR3Info function in the Dialog processor in disp+work.exe 7010.29.15.58313… CVSS 2.0HIGH 9.3
- TI-2013-01399 A Buffer Overflow vulnerability exists in the Message Server service… CVSS 3.1CRITICAL 9.8
- TI-2016-02149 Directory traversal vulnerability in the GetFileList function in the SAP Manufacturing… CVSS 3.0HIGH 7.5
Sources
- CVE-2026-23685 · CVE Program
- CVE-2026-23685 · NVD
- FIRST EPSS
- GHSA-ccw7-5mwj-q9wj · GitHub Advisory Database · CC BY 4.0
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