CVE-2021-42127

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 65.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-07 · updated 2026-06-17
Weakness: CWE-502

Description

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

How to fix

Upgrade to a fixed version: Ivanti Avalanche 6.3.3. Check the vendor advisory for mitigations.

References

https://forums.ivanti.com/s/article/Security-Alert-CVE-s-Addressed-in-Avalanche-6-3-3
https://forums.ivanti.com/s/article/Security-Alert-CVE-s-Addressed-in-Avalanche-6-3-3

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