CVE-2026-9477 - Totolink A8000RU Web Management cstecgi.cgi setAccessDeviceCfg os command injection

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CRITICAL

Totolink A8000RU Web Management cstecgi.cgi setAccessDeviceCfg os command injection

Published May 25, 2026

9.3

CRITICAL

CVSS 4.0

EPSS 3.25%

Description

A security flaw has been discovered in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument mac results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

Affected products

Vendor TOTOLINK Product n/a Default
n/a
- Version
  7.1cu.643_b20200521
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

TOTOLINK

n/a

Version	Status	Constraints
7.1cu.643_b20200521	affected	-

Remediation

No remediation recorded yet.

Weaknesses (2)

CWE-77

CWE-78

OS Command Injection

References (5)

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_349/README.md
exploit
https://vuldb.com/submit/813460
third-party-advisory
https://vuldb.com/vuln/365458
vdb-entrytechnical-description
https://vuldb.com/vuln/365458/cti
signaturepermissions-required
https://www.totolink.net/
product

Link	Providers	Tags
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_349/README.md		exploit
https://vuldb.com/submit/813460		third-party-advisory
https://vuldb.com/vuln/365458		vdb-entrytechnical-description
https://vuldb.com/vuln/365458/cti		signaturepermissions-required
https://www.totolink.net/		product