Vulnerability · Published Jun 5, 2025 · Assigned by VulDB

CVE-2025-5623D-Link DIR-816 qosClassifier stack-based overflow

Critical 9.8

In plain English

A critical-severity stack buffer overflow 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 19.5% (higher than 97% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)19.5%top 2.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in D-Link DIR-816 1.10CNB05. It has been classified as critical. This affects the function qosClassifier of the file /goform/qosClassifier. The manipulation of the argument dip_address/sip_address leads to stack-based buffer overflow. It is possible to initiate the attack 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-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

VDB-311109 | D-Link DIR-816 qosClassifier stack-based overflow vdb-entry, technical-description
VDB-311109 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #589224 | D-Link DIR816 1.10CNB05 Stack-based Buffer Overflow third-party-advisory
https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_51/51.md exploit
https://www.dlink.com/ product