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 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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.075 (94.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.076 · newest: 0.075 · change: -0.001
Affected products
- D-Link Dir-816 — versions 1.10CNB05
- Dlink Dir-816
- Dlink Dir-816 Firmware — versions 1.10cnb05
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_49/49.md (Exploit, Third Party Advisory, exploit)
- www.dlink.com/ (Product, product)
Frequently asked questions
- What is CVE-2025-5621?
- CVE-2025-5621 is a high-severity vulnerability in D-Link Dir-816, classified under Command Injection. CVSS score: 7.3/10. Published 2025-06-05.
- How severe is CVE-2025-5621?
- High severity. CVSS v3 base score is 7.3 out of 10.