An authentication bypass vulnerability exists in Avalanche versions 6.3.x and below that could allow an attacker to gain access by exploiti…

Published 3 y ago 2023-05-09 · modified 4 mo ago 2026-06-17 · JSON

CVSS

5.9

v3.1 · CNA

CISA KEV

not known exploited

EPSS

66.7%

percentile 99%

Public exploits

none known

An authentication bypass vulnerability exists in Avalanche versions 6.3.x and below that could allow an attacker to gain access by exploiting the SetUser method or can exploit the Race Condition in the authentication message.

CISA SSVC assessment

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 21 mo ago 2025-01-29

Exploit prediction (EPSS)

66.66% probability of exploitation in the next 30 days, higher than 99% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CISA ADP	3.1	5.9	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`
NVD	3.1	5.9	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`
CNA	3.1	5.9	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`

Affected products

n/a Avalanche

Classification

Weakness

CWE-305 Authentication Bypass by Primary Weakness
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

forums.ivanti.com /s/article/ZDI-CAN-17750-Ivanti-Avalanche-EnterpriseServer-GetSettings-Exposed-Dangerous-M · x_transferred

Sources

CVE List: CVE-2023-28126
NVD: CVE-2023-28126

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary