CVE-2026-9457

CRITICAL

Totolink A8000RU Web Management cstecgi.cgi UploadFirmwareFile os command injection

Title source: cna

Description

A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-365438 | Totolink A8000RU Web Management cstecgi.cgi UploadFirmwareFile os command injection

https://vuldb.com/vuln/365438

Signature, Permissions Required signature permissions-required

VDB-365438 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/365438/cti

Third Party Advisory third-party-advisory

Submit #813454 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/813454

Exploit exploit

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_343/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0209

EPSS Percentile 79.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-77 CWE-78

Status published

Products (1)

Totolink/A8000RU 7.1cu.643_b20200521

Published May 25, 2026

Tracked Since May 25, 2026