원문 설명
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).
실제 악용 확인(CISA KEV)
- KEV 등재일
- 2026-07-21
- 조치 기한(미 연방기관)
- 2026-07-24
- 랜섬웨어 사용
- Unknown
- 요구 조치
- 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.
상세
- 공개일
- 2026-07-16
- 최종 수정
- 2026-07-22
- CVSS 벡터
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- CWE
- CWE-121
- EPSS(30일 내 악용 확률)
- 4.00% (백분위 91)
참고 자료
- cve.org/CVE-2021-27137
- nvd.nist.gov/vuln/detail/CVE-2021-27137
- svn.dd-wrt.com/changeset/45724
- ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/
- securityaffairs.com/193290/uncategorized/iot-botnet-c0xmo-adds-competitor-killing-capabili...
- www.bleepingcomputer.com/news/security/c0xmo-botnet-spreads-via-dd-wrt-router-flaw-kills-r...
- www.fortinet.com/blog/threat-research/inside-cross-platform-propagation-of-new-gafgyt-vari...
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이 제품은 NVD API 데이터를 사용하지만 NVD 의 보증이나 인증을 받은 것은 아닙니다. CVE® 는 The MITRE Corporation 의 등록 상표이며, CVE 레코드는 CVE Program 이용 약관에 따라 사용합니다.