Deserialization in Ivanti Avalanche

CVE-2021-42127

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.

Vulnerability class: Insecure Deserialization

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.658 (99.3th percentile), scored .

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-42127: held from 0.658 to 0.658.

EPSS over last 30 days · oldest: 0.658 · newest: 0.658 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-42127?
CVE-2021-42127 is a critical-severity vulnerability in Ivanti Avalanche, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-12-07.
How severe is CVE-2021-42127?
Critical severity. CVSS v3 base score is 9.8 out of 10.