Which products and versions are affected by CVE-2021-42127?

Affected: Avalanche (Ivanti) versions >= 6.3.3. The full list is in the CVE brief.

Is CVE-2021-42127 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-42127 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-42127?

No public exploit code is known.

Is there a fix for CVE-2021-42127?

Fixed versions are available, including Avalanche 6.3.3.

How urgently should CVE-2021-42127 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2021-42127

Critical

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.

Published Dec 7, 2021 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2021-42127 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Avalanche (Ivanti).
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 66% probability of exploitation in the next 30 days.
Fixed versions are available, including Avalanche 6.3.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

66%

Higher than 99.2% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2021-42127 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
AvalancheIvanti	>= 6.3.3	6.3.3

Patched Releases

Avalanche

6.3.3

Timeline

Publicly disclosed
Dec 7, 2021
Last updated
Nov 21, 2024

Weakness Type

CWE-502 Deserialization of Untrusted Data

References

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

FAQ

Common Questions.

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.
Affected: Avalanche (Ivanti) versions >= 6.3.3. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Avalanche 6.3.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2021-42127 Running On Your Attack Surface?

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