# CVE-2025-29520: Privilege escalation in n/a

> Authenticated low-privilege users can change high-privileged account passwords in the D-Link DSL-7740C Maintenance module, leading to privilege escalation.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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:** 25 Aug 2025
- **Updated:** 26 Aug 2025
- **Also known as:** GHSA-574m-6cvf-845m

## What is CVE-2025-29520?

CVE-2025-29520 is a medium-severity vulnerability in n/a, published on 25 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Incorrect access control in the Maintenance module of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows authenticated attackers with low-level privileges to arbitrarily change the high-privileged account passwords and escalate privileges.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2025-29520?

It affects 1 product.


Products: Dlink Dsl-7740c Firmware.

## How do I fix CVE-2025-29520?

No fix has been published for CVE-2025-29520 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-29520 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-29520 exists.

## Other vulnerabilities in n/a

- [CVE-2025-29514](https://insights.sbomify.com/CVE-2025-29514/): Missing authorization in n/a (critical 9.8)
- [CVE-2025-29515](https://insights.sbomify.com/CVE-2025-29515/): Missing authorization in n/a (critical 9.8)
- [CVE-2020-12774](https://insights.sbomify.com/CVE-2020-12774/): D-Link DSL-7740C - Command Injection (high 8.2)
- [CVE-2025-29516](https://insights.sbomify.com/CVE-2025-29516/): Command injection in n/a (high 7.2)
- [CVE-2025-29523](https://insights.sbomify.com/CVE-2025-29523/): Command injection in n/a (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-29520 and fix it if it is affected.

What it is: CVE-2025-29520 is a medium-severity vulnerability in n/a, published on 25 Aug 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-2025-29520 exists.

Affected product: n/a. 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-2025-29520/ (Markdown: https://insights.sbomify.com/CVE-2025-29520/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-29520
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-29520
- OSV: https://osv.dev/vulnerability/CVE-2025-29520

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-29520/
Summaries are generated and may contain mistakes; the official description above is the record.