CVE-2020-24681: Incorrect Permission Assignment for Critical Resource vulnerability in B&R Industrial Automation Automation St

Routine

HIGH 8.2UPGRADE

CVE-2020-24681 is a high-severity flaw (CVSS 8.2) affecting automation studio. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect Permission Assignment for Critical Resource vulnerability in B&R Industrial Automation Automation Studio allows Privilege Escalation.This issue affects Automation Studio: from 4.6.0 through 4.6.X, from 4.7.0 before 4.7.7 SP, from 4.8.0 before 4.8.6 SP, from 4.9.0 before 4.9.4 SP.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 96%)
CISA exploited list	No
Weakness	CWE-732
Published	2024-02-02
Last modified	2026-06-17

Publisher (CNA): Asea Brown Boveri Ltd. (ABB) · Vendor: br-automation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-02-02 07:15 UTCPublished CVE record published
2026-06-17 03:05 UTCUpdated Record last modified

br-automation automation studio UPGRADE

Affected: >= 4.0 and < 4.7.7.74 · >= 4.8 and < 4.8.6.30 · >= 4.9 and < 4.9.4.92

Fixed in: 4.7.7.74, 4.8.6.30, 4.9.4.92

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy automation-studio || rpm -q automation-studio || automation-studio --version

2. UPGRADE to 4.7.7.74 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade automation-studio

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade automation-studio

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison automation-studio sudo apt install automation-studio=<VERSION_BEFORE_4.0> sudo apt-mark hold automation-studio

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list automation-studio sudo dnf downgrade automation-studio-<VERSION_BEFORE_4.0> sudo dnf versionlock add automation-studio

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-24681?

automation studio: upgrade to 4.7.7.74, 4.8.6.30, 4.9.4.92. Exact commands for each OS are on this page.

Is CVE-2020-24681 being exploited?

CVE-2020-24681 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-24681 affect?

CVE-2020-24681 affects automation studio. Severity is high (CVSS 8.2). Incorrect Permission Assignment for Critical Resource vulnerability in B&R Industrial Automation Automation Studio allows Privilege Escalation.This issue affects Automation Studio: from 4.6.0 through 4.6.X, from 4.7.0 before 4.7.7 SP, from

How urgent is CVE-2020-24681?

Priority 30/100. High severity

Related CVEs

CVE-2024-0220 HIGH 8.3 UPGRADE UPGRADE B&R Automation Studio Upgrade Service and B&R Technology Guarding use insufficient cryptography for communicat
CVE-2021-22282 HIGH 8.3 UPGRADE Improper Control of Generation of Code ('Code Injection') vulnerability in B&R Industrial Automation Automatio
CVE-2021-22281 MEDIUM 6.3 UPGRADE : Relative Path Traversal vulnerability in B&R Industrial Automation Automation Studio allows Relative Path Tr
CVE-2021-22280 HIGH 7.2 UPGRADE Improper DLL loading algorithms in B&R Automation Studio versions >=4.0 and <4.12 may allow an authenticated l
CVE-2020-24682 HIGH 7.2 UPGRADE UPGRADE Unquoted Search Path or Element vulnerability in B&R Industrial Automation Automation Studio, B&R Industrial A

References

← Back to latest CVEs