CVE-2019-17621
Actively exploited. CVE-2019-17621 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-06-29) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2019-17621 is indexed in Metasploit and GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.
CSIRTS triage
- What
- A command execution vulnerability in the UPnP endpoint allows an unauthenticated remote attacker to execute system commands as root.
- Who is affected
- Users of D-Link DIR-859 routers connected to the local network.
- Urgency
- Remediation is critical due to the active exploitation of this vulnerability.
- Action
- Apply the latest firmware update from D-Link.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2019-17621 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2019-17621: D-Link DIR-859 Router Command Execution Vulnerabilitycisa-kev · 2023-06-29
External references
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[](https://www.csirts.com/cve/CVE-2019-17621)