SAP NetWeaver ABAP Signed XML Tampering Attack
CVE-2026-23687 Published on February 10, 2026

XML Signature Wrapping in SAP NetWeaver AS ABAP and ABAP Platform
SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated attacker with normal privileges to obtain a valid signed message and send modified signed XML documents to the verifier. This may result in acceptance of tampered identity information, unauthorized access to sensitive user data and potential disruption of normal system usage.

NVD

Vulnerability Analysis

CVE-2026-23687 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Improper Verification of Cryptographic Signature

The software does not verify, or incorrectly verifies, the cryptographic signature for data.


Products Associated with CVE-2026-23687

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SAP NetWeaver
 

Affected Versions

SAP_SE SAP NetWeaver AS ABAP and ABAP Platform:

Exploit Probability

EPSS
0.01%
Percentile
2.70%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.