# 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.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Jul 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-j74w-g6f3-9wr9

## 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 (Use of Single-factor Authentication)

## 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.

## Is CVE-2025-42959 being exploited?

There is no known exploitation of CVE-2025-42959 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-42959 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2025-42959 in the wild and no public exploit code.

Affected product: SAP_SE SAP NetWeaver ABAP Server and ABAP Platform. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-42959/ (Markdown: https://insights.sbomify.com/CVE-2025-42959/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-42959
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-42959
- OSV: https://osv.dev/vulnerability/CVE-2025-42959

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-42959/
Summaries are generated and may contain mistakes; the official description above is the record.