What’s Vulnerable › Vulnerabilities

CVE-2023-32152: D-Link DIR-2640 HNAP LoginPassword Authentication Bypass Vulnerability

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 28.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-03 · updated 2026-06-17
• Weakness: CWE-303

Description

D-Link DIR-2640 HNAP LoginPassword Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-2640 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web management interface, which listens on TCP port 80 by default. A specially crafted login request can cause authentication to succeed without providing proper credentials. An attacker can leverage this vulnerability to bypass authentication on the system. . Was ZDI-CAN-19549.

Affected products

• D-Link DIR-2640: 1.11b02

References

• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10323
• https://www.zerodayinitiative.com/advisories/ZDI-23-544/
• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10323
• https://www.zerodayinitiative.com/advisories/ZDI-23-544/

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