What’s Vulnerable › Vulnerabilities

CVE-2021-42133

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% 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-434

Description

An exposed dangerous function vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to perform an arbitrary file write.

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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