What’s Vulnerable › Vulnerabilities

CVE-2024-5294: D-Link DIR-3040 prog.cgi websSecurityHandler Memory Leak Denial-of-Service Vulnerability

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-23 · updated 2026-06-17
• Weakness: CWE-401

Description

D-Link DIR-3040 prog.cgi websSecurityHandler Memory Leak Denial-of-Service Vulnerability. This vulnerability allows network-adjacent attackers to create a denial-of-service condition 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 program, which handles HNAP requests made to the lighttpd webserver listening on ports 80 and 443. The issue results from the lack of proper memory management when processing HTTP cookie values. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. . Was ZDI-CAN-21668.

Affected products

• D-Link DIR-3040: 120b03

References

• https://www.zerodayinitiative.com/advisories/ZDI-24-445/
• https://www.zerodayinitiative.com/advisories/ZDI-24-445/

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