CVE-2021-32926

HIGH

Rockwell Automation Micro800/MicroLogix 1400 DoS via Password Change Interception

Title source: llm
STIX 2.1

Description

When an authenticated password change request takes place, this vulnerability could allow the attacker to intercept the message that includes the legitimate, new password hash and replace it with an illegitimate hash. The user would no longer be able to authenticate to the controller (Micro800: All versions, MicroLogix 1400: Version 21 and later) causing a denial-of-service condition

References (1)

Core 1
Core References
Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-21-145-02

Scores

CVSS v3 7.5
EPSS 0.0219
EPSS Percentile 80.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-300
Status published
Products (3)
None/Micro800, MicroLogix 1400 Micro800: All versions, MicroLogix 1400: Version 21 and later when Enhanced Password Security enable
rockwellautomation/micro800_firmware
rockwellautomation/micrologix_1400_firmware 21.0
Published Jun 03, 2021
Tracked Since Feb 18, 2026