Is CVE-2026-9387 actively exploited?

No active exploitation of CVE-2026-9387 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-9387 be exploited remotely?

Yes. CVE-2026-9387 is exploitable remotely over the network (CVSS attack vector: Network).

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

CVE-2026-9387 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-9387

CWE-77Published: May 24, 2026· Updated: May 26, 2026

9.8

CVSS v3.1

EPSS:0.89%probability of exploitation in 30 daysPercentile:75.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-9387 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.