An unrestricted file upload vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to…

published 2021-12-07 4y ago modified 2026-06-17 4mo ago also EUVD-2021-29110

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 81.6%; EPSS 81.6% chance of exploitation in 30 days, percentile 99.6%
public exploits: 0; none known

An unrestricted file upload vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to write dangerous files.

Patch / fix

fixed in 1

ivanti avalanche 6.3.3

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Exploit prediction

81.60% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

n/a Ivanti Avalance

Classification

Weakness

CWE-502 Deserialization of Untrusted Data
CWE-434 Unrestricted Upload of File with Dangerous Type

Technology feeds

Ivanti rss critical rss

References

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

Sources

CVE List CVE-2021-42125
NVD CVE-2021-42125

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