CVE-2021-22659

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Summary

CVECVE-2021-22659
StatePUBLISHED
Assignericscert
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-03-25 16:15:14 UTC
Updated2026-06-03 14:16:24 UTC
DescriptionRockwell Automation MicroLogix 1400 Version 21.6 and below may allow a remote unauthenticated attacker to send a specially crafted Modbus packet allowing the attacker to retrieve or modify random values in the register. If successfully exploited, this may lead to a buffer overflow resulting in a denial-of-service condition. The FAULT LED will flash RED and communications may be lost. Recovery from denial-of-service condition requires the fault to be cleared by the user.

Risk And Classification

Primary CVSS: v3.1 8.6 HIGH from [email protected]

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

Problem Types: CWE-120 | CWE-120 CLASSIC BUFFER OVERFLOW CWE-120

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Rockwellautomation Micrologix 1400 - All All All
Operating System Rockwellautomation Micrologix 1400 Firmware All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Rockwell Automation MicroLogix 1400 affected MicroLogix 1400, All series Version 21.6 and below Not specified

References

ReferenceSourceLinkTags
Rockwell Automation MicroLogix 1400 | CISA af854a3a-2127-422b-91ae-364da2661108 us-cert.cisa.gov Third Party Advisory, US Government Resource
Sign In af854a3a-2127-422b-91ae-364da2661108 rockwellautomation.custhelp.com Permissions Required, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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