CVE-2021-33541

Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability

HIGH
7.5
CVSS Score
Published: June 25, 2021 at 06:26 PM UTC
Updated: June 17, 2026 at 03:54 AM UTC
4 products affected across 1 vendorILC1X1 FirmwareILC1X0 FirmwareILC1x1

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRMThird Party Advisory
https://cert.vde.com/en-us/advisories/vde-2021-019

CVSS

7.5HIGHCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

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