CVE-2021-29221: Erlang Erlang/otp

High severity, CVSS 7.0. EPSS: 0.6% chance of exploitation in the next 30 days.

A local privilege escalation vulnerability was discovered in Erlang/OTP prior to version 23.2.3. By adding files to an existing installation's directory, a local attacker could hijack accounts of other users running Erlang programs or possibly coerce a service running with "erlsrv.exe" to execute arbitrary code as Local System. This can occur only under specific conditions on Windows with unsafe filesystem permissions.

Affected products

• Erlang Erlang/otp: before 23.2.3 (fixed in 23.2.3)

Published 2021-04-09. Last modified 2026-06-17.