Vulnerability · Published Jun 4, 2025 · Assigned by VulDB

CVE-2025-5621D-Link DIR-816 qosClassifier os command injection

High 7.3

In plain English

A high-severity OS command injection in DIR-816 from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 5.4% (higher than 93% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)5.4%top 7.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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 leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Affected products (as reported)

Vendor	Product	Versions
D-Link	DIR-816	1.10CNB05

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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
https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_49/49.md exploit
https://www.dlink.com/ product