CVE-2026-9457: Totolink A8000RU Web Management cstecgi.cgi UploadFirmwareFile os command injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-25 · updated 2026-07-23
Weakness: CWE-77

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.

Affected products

Totolink A8000RU: 7.1cu.643_b20200521

References

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_343/README.md
https://vuldb.com/submit/813454
https://vuldb.com/vuln/365438
https://vuldb.com/vuln/365438/cti
https://www.totolink.net/

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