CVE-2021-42127

9.8 criticalEPSS 66%

Critical (9.8) in ivanti avalanche. EPSS 66% 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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 66% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-502
Published: 2021-12-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

ivanti:avalanche

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

Check your stack JSON