CVE-2025-42959 Missing Authentication check after implementation of SAP Security Note 3007182 and 3537476
Unauthenticated attackers can replay HMAC credentials to bypass authentication and compromise SAP NetWeaver ABAP systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-42959?
CVE-2025-42959 is a high-severity authentication bypass vulnerability in SAP_SE SAP NetWeaver ABAP Server and ABAP Platform, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-308
Which versions are affected by CVE-2025-42959?
How do I fix CVE-2025-42959?
No fix has been published for CVE-2025-42959 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-42959 being exploited?
There is no known exploitation of CVE-2025-42959 in the wild and no public exploit code.
Sources
Also known as GHSA-j74w-g6f3-9wr9.