High (7.5). EPSS 27% chance of exploitation in the next 30 days.
Portable UPnP SDK (aka libupnp) before 1.6.21 allows remote attackers to write to arbitrary files in the webroot via a POST request without a registered handler.
Severity
CVSS 3.0
7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
27% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)