CVE-2025-42959: SAP NetWeaver ABAP Server and ABAP Platform · Use of Single-factor Authentication
Affects SAP NetWeaver ABAP Server and ABAP PlatformSource CVE Database V5
Not known to be exploited · CVSS 8.1 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 8 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
AI-suggested
To mitigate CVE-2025-42959 effectively, organizations should: 1) Immediately identify and apply all relevant SAP security patches and updates for the affected SAP_BASIS versions to close the vulnerability on their systems. 2) Implement multi-factor authentication (MFA) mechanisms to reduce reliance on single-factor HMAC credentials, thereby strengthening authentication processes. 3) Conduct thorough audits to detect any unauthorized access or credential extraction attempts, focusing on systems that may be unpatched or vulnerable. 4) Employ network segmentation and strict access controls to limit the exposure of SAP systems and reduce the risk of credential replay attacks across different environments. 5) Monitor SAP system logs and network traffic for unusual authentication patterns or replay attack indicators. 6) Educate SAP administrators and security teams about the risks associated with single-factor authentication and replay attacks to enhance vigilance. 7) Consider deploying additional security layers such as SAP Enterprise Threat Detection tools and integrating SAP systems with broader enterprise security monitoring solutions. 8) Establish incident response plans specifically addressing SAP-related security incidents to enable rapid containment and remediation if exploitation occurs.
Description
An unauthenticated attacker may exploit a scenario where a Hashed Message Authentication Code (HMAC) credential, extracted from a system missing specific security patches, is reused in a replay attack against a different system. Even if the target system is fully patched, successful exploitation could result in complete system compromise, affecting confidentiality, integrity, and availability.