SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-42129

A command injection vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to perform arbitrary command execution.

HIGH 8.8EPSS 77.3%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 77.3%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.

Description

A command injection vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to perform arbitrary command execution.

CVSS 3.1
8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
77.26% probability · 100th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-77
Affected
ivanti/avalanche
Source
support@hackerone.com
EPSS trend
0%40%80%3 November 2026: 77.26%3 November 20263 November 2026

EPSS 77.3% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.