What is CVE-2025-5621?

CVE-2025-5621 is a high-severity vulnerability in D-link Dir-816, classified under OS Command Injection. CVSS score: 7.3/10. Published 2025-06-04.

How severe is CVE-2025-5621?

High severity. CVSS v3 base score is 7.3 out of 10.

RCE in D-link Dir-816

CVE-2025-5621

A vulnerability has been found in D-Link DIR-816 1.10CNB05 and classified as critical. Affected by this vulnerability is the function qosClassifier of the file /goform/qosClassifier. The manipulation of the argument dip_address/sip_address…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.067 (91.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Affected products

D-link Dir-816 — versions 1.10CNB05

Weakness classification (CWE)

References

VDB-311107 | D-Link DIR-816 qosClassifier os command injection (vdb-entry, technical-description)
VDB-311107 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
Submit #589221 | D-Link DIR816 1.10CNB05 OS Command Injection (third-party-advisory)
github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_49/49.md (exploit)
www.dlink.com/ (product)

Frequently asked questions

What is CVE-2025-5621?: CVE-2025-5621 is a high-severity vulnerability in D-link Dir-816, classified under OS Command Injection. CVSS score: 7.3/10. Published 2025-06-04.
How severe is CVE-2025-5621?: High severity. CVSS v3 base score is 7.3 out of 10.