# CVE-2025-4676: Authentication bypass by brute forcing Authentication Headers

> Attackers can bypass authentication by brute forcing headers on ABB WebPro SNMP Cards, gaining unauthorized access to the device.

- **Severity:** High 8.4 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 7 Jan 2026
- **Updated:** 7 Jan 2026
- **Also known as:** GHSA-m9qp-frxf-whqw

## What is CVE-2025-4676?

CVE-2025-4676 is a high-severity authentication bypass vulnerability in ABB WebPro SNMP Card PowerValue, published on 7 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Incorrect Implementation of Authentication Algorithm vulnerability in ABB WebPro SNMP Card PowerValue, ABB WebPro SNMP Card PowerValue UL.This issue affects WebPro SNMP Card PowerValue: through 1.1.8.K; WebPro SNMP Card PowerValue UL: through 1.1.8.K.

Weakness: CWE-303 (Incorrect Implementation of Authentication Algorithm)

## Which versions are affected by CVE-2025-4676?


## How do I fix CVE-2025-4676?

No fix has been published for CVE-2025-4676 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-4676 being exploited?

There is no known exploitation of CVE-2025-4676 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-4676 and fix it if it is affected.

What it is: CVE-2025-4676 is a high-severity authentication bypass vulnerability in ABB WebPro SNMP Card PowerValue, published on 7 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-4676 in the wild and no public exploit code.

Affected product: ABB WebPro SNMP Card PowerValue. 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-2025-4676/ (Markdown: https://insights.sbomify.com/CVE-2025-4676/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-4676
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-4676
- OSV: https://osv.dev/vulnerability/CVE-2025-4676

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-4676/
Summaries are generated and may contain mistakes; the official description above is the record.