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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 ov…

高危 CVSS 8.1
CVECVE-2021-27137
首次发现2026-07-17 19:16 UTC
披露时间2026-07-16 18:16 UTC
最后更新2026-07-17 19:16 UTC
通道状态auto

摘要

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).

中文摘要建设中，暂以英文摘要呈现（DR-003 v2）。

深度研判 · 自动通道

该漏洞尚未生成深度研判报告（DR-003 v2 AI pipeline 建设中）。

Lint 边界警告 (5)

以下是本次研判 lint 阶段发现的非阻塞性警告（如引用 URL 未在白名单内）。这些不影响漏洞条目可用性，仅为透明度披露（参 DR-002）。

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://securityaffairs.com/193290/uncategorized/iot-botnet-c0xmo-adds-competitor-killing-capability.html
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://svn.dd-wrt.com/changeset/45724
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://www.bleepingcomputer.com/news/security/c0xmo-botnet-spreads-via-dd-wrt-router-flaw-kills-rival-malware/
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/

数据来源

  • NVD DATABASE

原始链接

时间线

  1. nvd_ingest NVD