# CVE-2025-5849: Tenda AC15 HTTP POST Request SetRemoteWebCfg formSetSafeWanWebMan stack-based overflow

> A remote attacker can trigger a stack-based buffer overflow in the Tenda AC15 router via a crafted HTTP POST request, potentially leading to arbitrary code execution.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **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:** 8 Jun 2025
- **Updated:** 9 Jun 2025
- **Also known as:** GHSA-3c2j-gj86-4xvq

## What is CVE-2025-5849?

CVE-2025-5849 is a high-severity memory corruption vulnerability in Tenda Ac15 Firmware, published on 8 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Tenda AC15 15.03.05.19_multi. It has been classified as critical. This affects the function formSetSafeWanWebMan of the file /goform/SetRemoteWebCfg of the component HTTP POST Request Handler. The manipulation of the argument remoteIp leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-5849?

It affects 1 product.


Products: Tenda Ac15 Firmware.

## How do I fix CVE-2025-5849?

No fix has been published for CVE-2025-5849 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-5849 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5849 exists.

## Other vulnerabilities in Tenda Ac15 Firmware

- [CVE-2020-10987](https://insights.sbomify.com/CVE-2020-10987/): Tenda AC1900 Router AC15 Model Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2026-24103](https://insights.sbomify.com/CVE-2026-24103/): Memory corruption in n/a (critical 9.8)
- [CVE-2026-24101](https://insights.sbomify.com/CVE-2026-24101/): Command injection in n/a (critical 9.8)
- [CVE-2026-24105](https://insights.sbomify.com/CVE-2026-24105/): Command injection in n/a (critical 9.8)
- [CVE-2025-63666](https://insights.sbomify.com/CVE-2025-63666/): Information disclosure in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-5849 and fix it if it is affected.

What it is: CVE-2025-5849 is a high-severity memory corruption vulnerability in Tenda Ac15 Firmware, published on 8 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5849 exists.

Affected product: Tenda Ac15 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-2025-5849/ (Markdown: https://insights.sbomify.com/CVE-2025-5849/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-5849
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-5849
- OSV: https://osv.dev/vulnerability/CVE-2025-5849

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-5849/
Summaries are generated and may contain mistakes; the official description above is the record.