CVE-2026-109805
Weak Cryptography in SAP NetWeaver and ABAP Platform (Application Server ABAP)
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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Weak Cryptography in SAP NetWeaver and ABAP Platform (Application Server ABAP)
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.
- Record
CVE-2026-109805- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-328
- Updated
- 2026-11-10
EUVDEUVD-2026-120703
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.
- Record
EUVD-2026-120703- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-j6xx-7886-qfg8
Due to a weak HMAC cryptography calculation when receiving an RFC callback in SAP NetWeaver and...
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.
- Record
GHSA-j6xx-7886-qfg8- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-328
- Updated
- 2026-11-10
NVD
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.
- Record
CVE-2026-109805- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-328
- Updated
- 2026-11-10
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD | |
| aliases, published, references | EUVD, GitHub Advisories | |
| aliases, published | EUVD | |
| first indexed | CVE List |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-109805 is a medium vulnerability (CVSS 6.4) in Sap Se Netweaver And Abap Platform (application Server Abap), published November 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.13%, the 2nd percentile. No source names a fixed version.