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CRITICAL

CVE-2026-9387

CVSS v3

9.8

CRITICAL

EPSS Score

1.7 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

A security flaw has been discovered in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument resetFlags results in os command injection. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.

Technical details

CVSS v3 Vector
3.1
Published
2026-05-24
Last Modified
2026-07-23

Frequently asked questions

What is CVE-2026-9387?

A security flaw has been discovered in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument resetFlags results in os command injection. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.

Is CVE-2026-9387 actively exploited?

Active exploitation of CVE-2026-9387 has not been confirmed. The EPSS score is 1.7%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-9387?

CVE-2026-9387 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.

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