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Vulnerability record · CVE-2026-5509 · published 27 May 2026

CVE-2026-5509: Tp-link archer be450 firmware improper input validation vulnerability

Tp Link · Archer Be450 Firmware

An authenticated command injection vulnerability exists in the Archer BE450 v1 and BE7200 v1 router that allows an administrator to execute arbitrary system commands through the web management interface. After successfully authenticating to the admin interface, an attacker can leverage the browser’s developer console by supplying a crafted input that is passed to backend system commands without adequate sanitization. Successful exploitation enables execution of arbitrary commands with elevated privileges on the device, which may allow the attacker to start unauthorized services, modify system configuration, or otherwise fully compromise the router’s operating environment.

8.5 CVSS 4.0 High EPSS 5.2% · top 7.8% CWE-20 · Improper input validationCWE-77 · Command injection
8.5CVSS 4.0 base score
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

Description

An authenticated command injection vulnerability exists in the Archer BE450 v1 and BE7200 v1 router that allows an administrator to execute arbitrary system commands through the web management interface. After successfully authenticating to the admin interface, an attacker can leverage the browser’s developer console by supplying a crafted input that is passed to backend system commands without adequate sanitization. Successful exploitation enables execution of arbitrary commands with elevated privileges on the device, which may allow the attacker to start unauthorized services, modify system configuration, or otherwise fully compromise the router’s operating environment.

CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://jvn.jp/en/vu/JVNVU95687008/
https://www.tp-link.com/en/support/download/archer-be450/#Firmware Product
https://www.tp-link.com/jp/support/download/archer-be450/#Firmware Product
https://www.tp-link.com/jp/support/download/archer-be7200/#Firmware Product
https://www.tp-link.com/us/support/faq/5102/ Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-5509), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.