CVE-2025-5621

Name: CVE-2025-5621
Creator: NVD / NIST
Published: 2025-06-05T00:15:23.76+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 6.90%

Last modified Jun 17, 2026

CVE-2025-5621 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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. EPSS estimates a 6.90% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

6.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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:X/V:X/RE:X/U:X

EPSS Probability

6.90%

93.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dir-816 Firmware	1.10cnb05

References

https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_49/49.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.311107Permissions Required
https://vuldb.com/?id.311107Third Party Advisory, VDB Entry
https://vuldb.com/?submit.589221Third Party Advisory, VDB Entry
https://www.dlink.com/Product
https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_49/49.mdExploit, Third Party Advisory

Timeline

Published: Jun 5, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-5621?

How severe is CVE-2025-5621?

CVE-2025-5621 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 6.90% probability of exploitation in the next 30 days.

How do I fix CVE-2025-5621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-5621?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST