Remote code execution in Microsoft IIS 6.0 WebDAV service allows unauthenticated attackers to execute arbitrary code by sending a specially crafted PROPFIND request with a malicious 'If' header. Confirmed actively exploited (CISA KEV) since July-August 2016, predating public disclosure by 7+ months. EPSS score of 94.43% (100th percentile) reflects widespread exploitation against legacy Windows Server 2003 R2 systems still exposed to the internet. Multiple public exploits exist including Metasploit modules, and vendor patch has been available since March 2017.
The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large length value in an agent protocol message and leveraging the ability to connect. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 22.2%.
The netjoin processing in Irssi 1.x before 1.0.2 allows attackers to cause a denial of service (use-after-free) and possibly execute arbitrary code via unspecified vectors. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Subrion CMS 4.0.5.10 has SQL injection in admin/database/ via the query parameter. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.