CVE-2021-42128

Name: CVE-2021-42128
Creator: NVD / NIST
Published: 2021-12-07T14:15:09.3+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.50%

Last modified Jun 17, 2026

CVE-2021-42128 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An exposed dangerous function vulnerability exists in Ivanti Avalanche before 6.3.3 using inforail Service allows Privilege Escalation via Enterprise Server Service.. EPSS estimates a 4.50% chance of exploitation in the next 30 days.

Description

An exposed dangerous function vulnerability exists in Ivanti Avalanche before 6.3.3 using inforail Service allows Privilege Escalation via Enterprise Server Service.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.50%

90.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-749

Affected Software

Vendor	Product	Versions
Ivanti	Avalanche	< 6.3.3

References

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

Timeline

Published: Dec 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42128?

An exposed dangerous function vulnerability exists in Ivanti Avalanche before 6.3.3 using inforail Service allows Privilege Escalation via Enterprise Server Service.

How severe is CVE-2021-42128?

CVE-2021-42128 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.50% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42128?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42128?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST