CVE-2023-41230

Name: CVE-2023-41230
Creator: NVD / NIST
Published: 2024-05-03T03:15:35.717+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2023-41230 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. D-Link DIR-3040 HTTP Request Processing Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

D-Link DIR-3040 HTTP Request Processing Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the prog.cgi binary, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. The issue results from the lack of proper validation of a user-supplied string before copying it to a fixed size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21674.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.76%

50.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Dir-3040 Firmware	<= 1.20b03

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10350Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-1338/Third Party Advisory
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10350Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-1338/Third Party Advisory

Timeline

Published: May 3, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-41230?

How severe is CVE-2023-41230?

CVE-2023-41230 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2023-41230?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-41230?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST