# CVE-2023-43261: Information disclosure in n/a

> Attackers can access sensitive router components due to information disclosure in Milesight UR series routers.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Oct 2023
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-3r5f-38cp-r8x3

## What is CVE-2023-43261?

CVE-2023-43261 is a high-severity vulnerability in Milesight Ur32l Firmware, published on 4 Oct 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An information disclosure in Milesight UR5X, UR32L, UR32, UR35, UR41 before v35.3.0.7 allows attackers to access sensitive router components.

Weakness: CWE-532 (Insertion of Sensitive Information into Log File)

## Which versions are affected by CVE-2023-43261?

It affects 5 products.


Products: Milesight Ur32 Firmware, Milesight Ur32l Firmware, Milesight Ur35 Firmware, Milesight Ur41 Firmware, Milesight Ur5x Firmware.

## How do I fix CVE-2023-43261?

No fix has been published for CVE-2023-43261 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43261 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43261 exists.

Public exploit code:

- CVE-2023-43261 - Credential Leakage Through Unprotected System Logs and Weak Password Encryption (github_poc): https://github.com/win3zz/CVE-2023-43261
- Milesight Routers - Information Disclosure (nuclei): http/cves/2023/CVE-2023-43261.yaml

## Other vulnerabilities in Milesight Ur32l Firmware

- [CVE-2023-43260](https://insights.sbomify.com/CVE-2023-43260/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43261 and fix it if it is affected.

What it is: CVE-2023-43261 is a high-severity vulnerability in Milesight Ur32l Firmware, published on 4 Oct 2023. 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-2023-43261 exists.

Affected product: Milesight Ur32l Firmware. 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-2023-43261/ (Markdown: https://insights.sbomify.com/CVE-2023-43261/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43261
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43261
- OSV: https://osv.dev/vulnerability/CVE-2023-43261

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43261/
Summaries are generated and may contain mistakes; the official description above is the record.