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.

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

EPSS: 0.658 (99.2th percentile) — read the EPSS interpretation.

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.

Affected products

Ivanti Avalanche
N/a Ivanti Avalanche — versions 6.3.3

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

support@hackerone.com (x_refsource_MISC, Vendor Advisory)

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.