What is CVE-2023-26616?

CVE-2023-26616 is a critical-severity vulnerability in Dlink Dir-823g, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-06-29.

How severe is CVE-2023-26616?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Dlink Dir-823g

CVE-2023-26616

D-Link DIR-823G firmware version 1.02B05 has a buffer overflow vulnerability, which originates from the URL field in SetParentsControlInfo.

Vulnerability class: Buffer Overflow

Published 2023-06-29 · last modified 2026-06-17.

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: 0.013 (70.5th percentile), scored 2026-10-31.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Dlink Dir-823g
Dlink Dir-823g Firmware — versions 1.02b05

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.dlink.com/en/security-bulletin/ (Vendor Advisory)
github.com/726232111/VulIoT/tree/main/D-Link/DIR823G V1.0.2B05/HNAP1/SetParents… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-26616?: CVE-2023-26616 is a critical-severity vulnerability in Dlink Dir-823g, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-06-29.
How severe is CVE-2023-26616?: Critical severity. CVSS v3 base score is 9.8 out of 10.