CVE-2020-24685

AC500 V2 unauthenticated crafter packet vulnerability

HIGH
8.6
CVSS Score
Published: February 9, 2021 at 03:57 AM UTC
Updated: June 17, 2026 at 03:05 AM UTC
3 products affected across 1 vendorAC500 CPU FirmwarePm583-EthPm573-Eth

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Severity
HIGH8.6
Exploit prediction
EPSS 2%

Description

An unauthenticated specially crafted packet sent by an attacker over the network will cause a denial-of-service (DoS) vulnerability. Vulnerability allows attacker to stop the PLC. After stopping (ERR LED flashing red), physical access to the PLC is required in order to restart the application. This issue affects: ABB AC500 V2 products with onboard Ethernet version 2.8.4 and prior versions.

Affected

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

v ≤ 2.8.4
Affected range stops below 2.8.5, so it looks safe — our inference, not a vendor statement
abb-pm573-eth (environment) · abb-pm583-eth (environment)
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

8.6HIGHABB
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-789CWE-770

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