CVSS 3.1
6.4 mediumCVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:HCVE-2026-109805
Medium (6.4) in sap se sap netweaver and abap platform (application server abap). EPSS 0.1% estimated probability of exploitation activity in the next 30 days.
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Due to a weak HMAC cryptography calculation when receiving an RFC callback in SAP NetWeaver and ABAP Platform (Application Server ABAP), an authenticated attacker with high privileges and access to a network segment between application servers on an SAP system could intercept network communication between application servers and change the identity of the caller, enabling the execution of unauthorized function calls on the target server with escalated privileges leading to High impact on Confidentiality, Integrity, and Availability of the application.
Severity
- EPSS
- 0.1% estimated probability of exploitation activity in the next 30 days; 3rd percentile. Scored 2026-11-10. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-328 Use of Weak Hash
- OWASP Top 10
- A04:2025 Cryptographic Failures
- Published
- Assigned by
- sap (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Explain CVE-2026-109805 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-109805?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-109805?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-109805 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Affected
- sap_se:sap netweaver and abap platform (application server abap)
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | KRNL64NUC 7.22 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 7.22EXT |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | KRNL64UC 7.22 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 7.53 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | KERNEL 7.22 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 7.54 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 7.77 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 7.93 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 9.16 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 9.20 |
| SAP_SE SAP NetWeaver and ABAP Platform (Application Server ABAP) | 9.21 |
Attack patterns (CAPEC)
- CAPEC-68 Subvert Code-signing Facilities Likelihood: Low · Severity: Very High
- CAPEC-461 Web Services API Signature Forgery Leveraging Hash Function Extension Weakness Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.