D-Link DIR-859 Router Command Execution Vulnerability (CVE-2019-17621)
Severity: critical · Patch status: patched · Since 2023-06-29 · CVE-2019-17621
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. CISA added CVE-2019-17621 to its Known Exploited Vulnerabilities catalog on Jun 29, 2023, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
- US federal agencies must remediate by Jul 20, 2023 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
