Is CVE-2020-24685 in the CISA KEV catalog?

No. CVE-2020-24685 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-24685?

CVE-2020-24685 has a CVSS v3 base score of 8.6 (HIGH).

What is the EPSS score for CVE-2020-24685?

CVE-2020-24685 has an EPSS score of 1.61% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-24685?

Upgrade ac500 cpu firmware to 2.8.5 or later.

CVE & CISA-KEV Catalog

CVE-2020-24685

HIGHEPSS 73th pctl

8.6

CVSS v3

NVD

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.

CWE-789 CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

ac500 cpu firmwareNVD

Affected:< 2.8.5Fixed in:2.8.5CVE-2020-24685derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.61%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Patch1

search.abb.com

Related Vulnerabilities

Other CWE-789 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-30522	High	7.5	90%	-	Fix
CVE-2026-49975	High	7.5	11%	-	Fix
CVE-2025-27533	High	7.5	8.5%	-	Fix
CVE-2017-7651	High	7.5	5.3%	-	Fix
CVE-2021-31811	Medium	5.5	3.4%	-	-
CVE-2021-27906	Medium	5.5	3.3%	-	Fix

Embed a live status badge for CVE-2020-24685

Markdown

[![CVE-2020-24685](https://tridentstack.com/cve/badge/CVE-2020-24685.svg)](https://tridentstack.com/cve/CVE-2020-24685)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-24685"><img src="https://tridentstack.com/cve/badge/CVE-2020-24685.svg" alt="CVE-2020-24685"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.