Buffer overflow in D-Link Dir-816
CVE-2025-5623
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.185 (97.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.158 · newest: 0.185 · change: +0.028
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_51/51.md (Exploit, Third Party Advisory, exploit)
- www.dlink.com/ (Product, product)
Frequently asked questions
- What is CVE-2025-5623?
- CVE-2025-5623 is a critical-severity vulnerability in D-Link Dir-816, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2025-06-05.
- How severe is CVE-2025-5623?
- Critical severity. CVSS v3 base score is 9.8 out of 10.