Rockwell Automation MicroLogix 1400 up to 21.6 ModBus Packet buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Rockwell Automation MicroLogix 1400 up to 21.6. The impacted element is an unknown function of the component ModBus Packet Handler. The manipulation results in buffer overflow. This vulnerability is known as CVE-2021-22659. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Rockwell Automation MicroLogix 1400 up to 21.6 (Automation Software). Affected is an unknown code block of the component ModBus Packet Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on availability.

The weakness was published 03/26/2021 as icsa-21-033-01. The advisory is available at us-cert.cisa.gov. This vulnerability is traded as CVE-2021-22659. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/05/2021 🔍
03/26/2021 +80 days 🔍
03/26/2021 +0 days 🔍
06/03/2026 +1895 days 🔍

Sourcesinfo

Advisory: icsa-21-033-01
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-22659 (🔍)

GCVE (CVE): GCVE-0-2021-22659
GCVE (VulDB): GCVE-100-171750

Entryinfo

Created: 03/26/2021 07:20
Updated: 06/03/2026 19:36
Changes: 03/26/2021 07:20 (40), 04/05/2021 09:01 (5), 04/05/2021 09:06 (18), 06/03/2026 19:36 (26)
Complete: 🔍
Cache ID: 216::103

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