CVE-2026-5509

HIGH
Published May 27, 2026 Modified Jun 2, 2026 CWE-20 CWE-77

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.

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CVSS v3.1 Score

7.2
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0203
Probability of exploitation
0.78%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-20 Improper Input Validation
CWE-77 CWE-77

Affected Products

Vendor Product
tp-link archer_be450_firmware
tp-link archer_be450
tp-link archer_be7200_firmware
tp-link archer_be7200

References

Frequently Asked Questions

What is CVE-2026-5509? +
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. It has a CVSS v3.1 base score of 7.2 (HIGH).
How severe is CVE-2026-5509? +
CVE-2026-5509 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0203, placing it in the 1th percentile for exploitation probability.
What products are affected by CVE-2026-5509? +
CVE-2026-5509 affects products from tp-link, specifically: archer_be450, archer_be450_firmware, archer_be7200, archer_be7200_firmware. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-5509? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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