# CVE-2025-12602: /etc/avahi/services/z9.service can be Arbitrarily Written

> Attackers can arbitrarily write to a specific service file, potentially leading to code execution or privilege escalation on affected industrial controllers.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Nov 2025
- **Updated:** 3 Nov 2025
- **Also known as:** GHSA-vrg6-vm63-85rh

## What is CVE-2025-12602?

CVE-2025-12602 is a low-severity path traversal vulnerability in Azure Access Technology BLU-IC2, published on 1 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

/etc/avahi/services/z9.service can be Arbitrarily Written.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2025-12602?

It affects 2 products.


Products: Azure-Access Blu-Ic2 Firmware, Azure-Access Blu-Ic4 Firmware.

## How do I fix CVE-2025-12602?

No fix has been published for CVE-2025-12602 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-12602 being exploited?

There is no known exploitation of CVE-2025-12602 in the wild and no public exploit code.

## Other vulnerabilities in Azure Access Technology BLU-IC2

- [CVE-2025-12599](https://insights.sbomify.com/CVE-2025-12599/): Multiple Devices are Sharing the Same Secrets for SDKSocket (TCP/5000) (critical 10.0)
- [CVE-2025-12600](https://insights.sbomify.com/CVE-2025-12600/): Web UI Malfunction (critical 10.0)
- [CVE-2025-12601](https://insights.sbomify.com/CVE-2025-12601/): Denial of Service Due to SlowLoris (critical 10.0)
- [CVE-2025-12553](https://insights.sbomify.com/CVE-2025-12553/): Server Certificate Verification Disabled (critical 10.0)
- [CVE-2025-12515](https://insights.sbomify.com/CVE-2025-12515/): Systemic Internal Server Errors - HTTP 500 Response (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-12602 and fix it if it is affected.

What it is: CVE-2025-12602 is a low-severity path traversal vulnerability in Azure Access Technology BLU-IC2, published on 1 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-12602 in the wild and no public exploit code.

Affected product: Azure Access Technology BLU-IC2. 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-2025-12602/ (Markdown: https://insights.sbomify.com/CVE-2025-12602/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-12602
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-12602
- OSV: https://osv.dev/vulnerability/CVE-2025-12602

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-12602/
Summaries are generated and may contain mistakes; the official description above is the record.