What is CVE-2023-39749?

CVE-2023-39749 is a critical-severity vulnerability in Dlink Dap-2660, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-08-21.

How severe is CVE-2023-39749?

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

Buffer overflow in Dlink Dap-2660

CVE-2023-39749

D-Link DAP-2660 v1.13 was discovered to contain a buffer overflow via the component /adv_resource. This vulnerability is exploited via a crafted GET request.

Vulnerability class: Buffer Overflow

Published 2023-08-21 · 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: 0.012 (66.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Dlink Dap-2660
Dlink Dap-2660 Firmware — versions 1.13

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/a101e-IoTvul/iotvul/blob/main/d-link/2/D-Link DAP-2660 adv_resource… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-39749?: CVE-2023-39749 is a critical-severity vulnerability in Dlink Dap-2660, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-08-21.
How severe is CVE-2023-39749?: Critical severity. CVSS v3 base score is 9.8 out of 10.