What is CVE-2023-44420?

CVE-2023-44420 is a high-severity vulnerability in D-Link Dir-X3260, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 8.8/10. Published 2024-05-03.

How severe is CVE-2023-44420?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in D-Link Dir-X3260

CVE-2023-44420

D-Link DIR-X3260 prog.cgi Incorrect Implementation of Authentication Algorithm Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-X3260 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the prog.cgi executable. The issue results from an incorrect implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the device. Was ZDI-CAN-21100.

Published 2024-05-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-303 — Incorrect Implementation of Authentication Algorithm

References

www.zerodayinitiative.com/advisories/ZDI-23-1518/ (x_research-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2023-44420?: CVE-2023-44420 is a high-severity vulnerability in D-Link Dir-X3260, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 8.8/10. Published 2024-05-03.
How severe is CVE-2023-44420?: High severity. CVSS v3 base score is 8.8 out of 10.