CVE-2026-1623: Totolink A7000R cstecgi.cgi setUpgradeFW command injection

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-29 · updated 2026-06-17
Weakness: CWE-74

Description

A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument FileName causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

Totolink A7000R: 4.1cu.4154

References

https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md#poc
https://vuldb.com/?ctiid.343382
https://vuldb.com/?id.343382
https://vuldb.com/?submit.740767
https://www.totolink.net/

Get alerted when CVE-2026-1623 or the next vulnerability affects your stack