CyberRota Analysis
AI-GeneratedAn unsafe strcpy vulnerability in the UPnP handling functionality of DD-WRT prior to version 45724 allows unauthenticated remote attackers to exploit a buffer overflow via crafted M-SEARCH requests, potentially leading to arbitrary code execution. While UPnP is disabled by default and only listens on internal interfaces, users who have enabled this feature should prioritize patching to mitigate the risk of exploitation. Network administrators and users of DD-WRT firmware should assess their configurations and apply the necessary updates to safeguard against this high-severity vulnerability.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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CISA KEV Details
Status: This CVE is listed in CISA's Known Exploited Vulnerabilities catalog.
Ransomware use: Unknown
Added to KEV: 2026-07-21
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Original NVD Description
An issue was discovered in router/upnp/src/ssdp.c in DD-WRT before 45724. An unsafe strcpy in the UPnP handling functionality allows an unauthenticated remote attacker to send a request that would overflow an internal fixed buffer. Exploitation requires the DD-WRT user to enable UPnP (which is off by default, and only listens on internal interfaces by default). This occurs in ssdp_msearch (reachable by an M-SEARCH request).
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