What is CVE-2023-39671?

CVE-2023-39671 is a critical-severity vulnerability in Dlink Dir-880l A1, 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-2023-39671?

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

Buffer overflow in Dlink Dir-880l A1

CVE-2023-39671

D-Link DIR-880 A1_FW107WWb08 was discovered to contain a buffer overflow via the function FUN_0001be68.

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 (71.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.4% 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-880l A1
Dlink Dir-880l A1 Firmware — versions 107wwb08

Weakness classification (CWE)

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

References

www.dlink.com/en/security-bulletin/ (Vendor Advisory)
support.dlink.com/ (Product)
github.com/Davidteeri/Bug-Report/blob/main/D-Link/DIR880 buffer overflow.md (Broken Link)

Frequently asked questions

What is CVE-2023-39671?: CVE-2023-39671 is a critical-severity vulnerability in Dlink Dir-880l A1, 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-2023-39671?: Critical severity. CVSS v3 base score is 9.8 out of 10.