# CVE-2025-14993: Tenda AC18 HTTP Request SetDlnaCfg sprintf stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the Tenda AC18 router's HTTP handler, 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:** 21 Dec 2025
- **Updated:** 24 Feb 2026
- **Also known as:** GHSA-29qw-ccch-hcg3

## What is CVE-2025-14993?

CVE-2025-14993 is a high-severity memory corruption vulnerability in Tenda Ac18 Firmware, published on 21 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was detected in Tenda AC18 15.03.05.05. This affects the function sprintf of the file /goform/SetDlnaCfg of the component HTTP Request Handler. The manipulation of the argument scanList results in stack-based buffer overflow. The attack can be executed remotely. The exploit is now 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-2025-14993?

It affects 1 product.


Products: Tenda Ac18 Firmware.

## How do I fix CVE-2025-14993?

No fix has been published for CVE-2025-14993 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-14993 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-14993 exists.

## Other vulnerabilities in Tenda Ac18 Firmware

- [CVE-2024-57575](https://insights.sbomify.com/CVE-2024-57575/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57579](https://insights.sbomify.com/CVE-2024-57579/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57580](https://insights.sbomify.com/CVE-2024-57580/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57581](https://insights.sbomify.com/CVE-2024-57581/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57582](https://insights.sbomify.com/CVE-2024-57582/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-14993 and fix it if it is affected.

What it is: CVE-2025-14993 is a high-severity memory corruption vulnerability in Tenda Ac18 Firmware, published on 21 Dec 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-2025-14993 exists.

Affected product: Tenda Ac18 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-2025-14993/ (Markdown: https://insights.sbomify.com/CVE-2025-14993/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-14993
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-14993
- OSV: https://osv.dev/vulnerability/CVE-2025-14993

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-14993/
Summaries are generated and may contain mistakes; the official description above is the record.