What is CVE-2023-39665?

CVE-2023-39665 is a critical-severity vulnerability in Dlink Dir-868l, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-08-18.

How severe is CVE-2023-39665?

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

Buffer overflow in Dlink Dir-868l

CVE-2023-39665

D-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the acStack_50 parameter.

Vulnerability class: Buffer Overflow

Published 2023-08-18 · 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: 0.014 (72.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Dlink Dir-868l — versions a
Dlink Dir-868l Firmware — versions 1.12_eu_multi_20170316

Weakness classification (CWE)

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

References

www.dlink.com/en/security-bulletin/ (Product)
support.dlink.com/ (Product)
github.com/Davidteeri/Bug-Report/blob/main/D-Link/DIR-868L-bufferoverflow.md (Broken Link)

Frequently asked questions

What is CVE-2023-39665?: CVE-2023-39665 is a critical-severity vulnerability in Dlink Dir-868l, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-08-18.
How severe is CVE-2023-39665?: Critical severity. CVSS v3 base score is 9.8 out of 10.