# CVE-2025-7572: LB-LINK BL-WR9000 lighttpd.cgi bs_GetHostInfo information disclosure

> Remote attackers can exploit a flaw in the lighttpd.cgi interface to disclose sensitive host information from LB-LINK routers.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jul 2025
- **Updated:** 14 Jul 2025
- **Also known as:** GHSA-h8c7-6g8w-2q9f

## What is CVE-2025-7572?

CVE-2025-7572 is a medium-severity vulnerability in LB-LINK BL-AC1900, published on 14 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability classified as critical was found in LB-LINK BL-AC1900, BL-AC2100_AZ3, BL-AC3600, BL-AX1800, BL-AX5400P and BL-WR9000 up to 20250702. This vulnerability affects the function bs_GetHostInfo in the library libblinkapi.so of the file /cgi-bin/lighttpd.cgi. The manipulation leads to information disclosure. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-284 (Improper Access Control), CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2025-7572?


## How do I fix CVE-2025-7572?

No fix has been published for CVE-2025-7572 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-7572 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7572 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7572 and fix it if it is affected.

What it is: CVE-2025-7572 is a medium-severity vulnerability in LB-LINK BL-AC1900, published on 14 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7572 exists.

Affected product: LB-LINK BL-AC1900. 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-2025-7572/ (Markdown: https://insights.sbomify.com/CVE-2025-7572/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7572
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7572
- OSV: https://osv.dev/vulnerability/CVE-2025-7572

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-7572/
Summaries are generated and may contain mistakes; the official description above is the record.