CVE-2026-129258

CVSS 9.1 (critical) · published 2026-11-14

A vulnerability was identified in Tenda AC18 15.03.05.05_multi/15.03.05.19 Build 6318. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/upgrade of the component Firmware Upgrade Handler. Such manipulation of the argument upgradeFile leads to insufficient verification of data authenticity. The attack may be launched remotely. The exploit is publicly available and might be used.

Weakness: CWE-345

Source: NVD CVE-2026-129258

References

• https://github.com/longqx223/Tenda-ac-18-V15.03.05.05-/blob/main/2026-10-19-Tenda-AC18-unsigned-firmware-update-advisory-EN.pdf
• https://vuldb.com/cve/CVE-2026-129258
• https://vuldb.com/submit/1043033
• https://vuldb.com/vuln/437295
• https://vuldb.com/vuln/437295/cti
• https://www.tenda.com.cn/

Check your software

Connect an AI agent to the FixLane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.