CVE-2021-22699

HIGH

Modicon M241/M251 Firmware < 5.1.9.1 - Denial of Service via Crafted HTTP Requests

Title source: llm
STIX 2.1

Description

Improper Input Validation vulnerability exists in Modicon M241/M251 logic controllers firmware prior to V5.1.9.1 that could cause denial of service when specific crafted requests are sent to the controller over HTTP.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0037
EPSS Percentile 58.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-20
Status published
Products (2)
schneider-electric/modicon_m241_firmware < 5.1.9.1
schneider-electric/modicon_m251_firmware < 5.1.9.1
Published May 26, 2021
Tracked Since Feb 18, 2026