CVE-2026-109805
Weak Cryptography in SAP NetWeaver and ABAP Platform (Application Server ABAP)
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | sap_se |
| Product | sap netweaver and abap platform (application server abap) |
| Published | Nov 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
SAP_SE / SAP NetWeaver and ABAP Platform (Application Server ABAP)
KRNL64NUC 7.22 7.22EXT KRNL64UC 7.22 7.53 KERNEL 7.22 7.54 7.77 7.93 9.16 9.20 9.21