CVE-2021-42127: Ivanti Avalanche

Critical severity, CVSS 9.8. EPSS: 65.8% chance of exploitation in the next 30 days.

A deserialization of untrusted data vulnerability exists in Ivanti Avalanche before 6.3.3 using Inforail Service allows arbitrary code execution via Data Repository Service.

Affected products

• Ivanti Avalanche: before 6.3.3 (fixed in 6.3.3)

Published 2021-12-07. Last modified 2026-06-17.