CVE-2026-9455 - Totolink A8000RU Web Management cstecgi.cgi UploadOpenVpnCert os command injection

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CRITICAL

Totolink A8000RU Web Management cstecgi.cgi UploadOpenVpnCert os command injection

Published May 25, 2026

9.3

CRITICAL

CVSS 4.0

EPSS 3.25%

Description

A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. The manipulation of the argument FileName leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.

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 (6)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31673
Advisory
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_342/README.md
exploit
https://vuldb.com/submit/813449
third-party-advisory
https://vuldb.com/vuln/365436
vdb-entrytechnical-description
https://vuldb.com/vuln/365436/cti
signaturepermissions-required
https://www.totolink.net/
product

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31673		Advisory
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_342/README.md		exploit
https://vuldb.com/submit/813449		third-party-advisory
https://vuldb.com/vuln/365436		vdb-entrytechnical-description
https://vuldb.com/vuln/365436/cti		signaturepermissions-required
https://www.totolink.net/		product