# CVE-2026-3271: Tenda F453 httpd P2pListFilterof fromP2pListFilter buffer overflow

> Remote attackers can trigger a buffer overflow in the Tenda F453 router's httpd service via the P2pListFilterof endpoint, potentially leading to code execution or denial of service.

- **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:** 27 Feb 2026
- **Updated:** 27 Feb 2026
- **Also known as:** GHSA-3fx3-vmv7-fxc7

## What is CVE-2026-3271?

CVE-2026-3271 is a high-severity memory corruption vulnerability in Tenda F453, published on 27 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Tenda F453 1.0.0.3. This impacts the function fromP2pListFilter of the file /goform/P2pListFilterof of the component httpd. The manipulation of the argument page results in buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-3271?

It affects 1 product.


Products: Tenda F453 Firmware.

## How do I fix CVE-2026-3271?

No fix has been published for CVE-2026-3271 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3271 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3271 exists.

## Other vulnerabilities in Tenda F453

- [CVE-2026-5021](https://insights.sbomify.com/CVE-2026-5021/): Tenda F453 httpd PPTPUserSetting fromPPTPUserSetting stack-based overflow (high 8.7)
- [CVE-2026-4551](https://insights.sbomify.com/CVE-2026-4551/): Tenda F453 Parameters SafeClientFilter fromSafeClientFilter memory corruption (high 8.7)
- [CVE-2026-4552](https://insights.sbomify.com/CVE-2026-4552/): Tenda F453 Parameters VirtualSer fromVirtualSer memory corruption (high 8.7)
- [CVE-2026-4553](https://insights.sbomify.com/CVE-2026-4553/): Tenda F453 Parameters Natlimit fromNatlimit stack-based overflow (high 8.7)
- [CVE-2026-3726](https://insights.sbomify.com/CVE-2026-3726/): Tenda F453 webExcptypemanFilter fromwebExcptypemanFilter stack-based overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3271 and fix it if it is affected.

What it is: CVE-2026-3271 is a high-severity memory corruption vulnerability in Tenda F453, published on 27 Feb 2026. 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-2026-3271 exists.

Affected product: Tenda F453. 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-2026-3271/ (Markdown: https://insights.sbomify.com/CVE-2026-3271/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3271
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3271
- OSV: https://osv.dev/vulnerability/CVE-2026-3271

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3271/
Summaries are generated and may contain mistakes; the official description above is the record.