CVE-2026-9387

CRITICAL 9.8

Totolink A8000RU Web Management cstecgi.cgi setUpgradeFW os command injection

CVSS Score

9.8

EPSS Score

0.9%

EPSS Percentile

76th

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.

CWE	CWE-78 CWE-77
Vendor	totolink
Product	a8000ru
Published	May 24, 2026
Last Updated	May 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Totolink / A8000RU

7.1cu.643_b20200521

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/365350 vuldb.com: https://vuldb.com/vuln/365350/cti vuldb.com: https://vuldb.com/submit/813433 github.com: https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_334/README.md totolink.net: https://www.totolink.net/

Credits

🔍 LtzHuster (VulDB User)