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Critical

Improper Verification of Cryptographic Signature in SAP NetWeaver Application Server ABAP and ABAP Platform

IdentifiersCVE-2026-44748CWE-347· Improper Verification of…

CVE-2026-44748 affects SAP NetWeaver Application Server ABAP and ABAP Platform. According to the provided advisory content, an authenticated attacker with normal privileges can obtain a valid signed message and then submit modified signed XML documents to the verifier. The issue results in acceptance of tampered identity information, indicating improper verification of the XML signature or signed message contents during verification. This is consistent with CWE-347 (Improper Verification of Cryptographic Signature). Successful exploitation can allow altered identity assertions or related signed XML data to be treated as valid by the target application.

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ANALYST BRIEF

Impact, mitigation & remediation

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Impact

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Successful exploitation may cause the application to accept tampered identity information as authentic. This can lead to unauthorized access to sensitive user data and disruption of normal system usage. The provided content states that confidentiality, integrity, and availability are all impacted at a high level, and includes CVSS v3.1 vector AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, limit exposure of affected verification workflows to only trusted users and systems, minimize the number of accounts with access to the vulnerable functionality, and monitor for anomalous signed XML or identity-related transactions. Additional compensating controls may include restricting network access to the affected application interfaces and increasing logging and review of authentication and identity assertion processing. Specific vendor-supported mitigations beyond patching were not provided in the supplied content.

Remediation

Patch, then assume compromise.

Apply the SAP security fix referenced for CVE-2026-44748. The provided content cites SAP Note 3746332 as the relevant vendor reference. Organizations should update affected SAP NetWeaver Application Server ABAP and ABAP Platform systems in accordance with SAP's guidance from the associated Security Patch Day advisory.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

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Detection signatures

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