CVE-2025-14774: Incorrect Authorization vulnerability in ABB T-MAC Plus. This issue affects T-MAC Plus: 4.0-24.

Routine

HIGH 7.4DOWNGRADE

CVE-2025-14774 is a high-severity flaw (CVSS 7.4) affecting t-mac plus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect Authorization vulnerability in ABB T-MAC Plus. This issue affects T-MAC Plus: 4.0-24.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.4 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-06-03
Last modified	2026-07-22

Publisher (CNA): Asea Brown Boveri Ltd. (ABB) · Vendor: abb

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-03 11:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

abb t-mac plus DOWNGRADE

Affected: 4.0-24

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0-24

1. Check installed version

apt-cache policy t-mac-plus || rpm -q t-mac-plus || t-mac-plus --version

2. No fixed release: DOWNGRADE to a release before 4.0-24 (Debian / Ubuntu)

apt-cache madison t-mac-plus sudo apt install t-mac-plus=<VERSION_BEFORE_4.0-24> sudo apt-mark hold t-mac-plus

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list t-mac-plus sudo dnf downgrade t-mac-plus-<VERSION_BEFORE_4.0-24> sudo dnf versionlock add t-mac-plus

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-2025-14774?

t-mac plus: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-14774 being exploited?

CVE-2025-14774 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-2025-14774 affect?

CVE-2025-14774 affects t-mac plus. Severity is high (CVSS 7.4). Incorrect Authorization vulnerability in ABB T-MAC Plus. This issue affects T-MAC Plus: 4.0-24.

How urgent is CVE-2025-14774?

Priority 28/100. High severity

Software pages

ABB vulnerabilities

Related CVEs

CVE-2025-14771 CRITICAL 9.9 DOWNGRADE Files or directories accessible to external parties vulnerability in ABB T-MAC Plus. This issue affects T-MAC
CVE-2025-14772 HIGH 8.8 DOWNGRADE Authorization bypass through User-Controlled key vulnerability in ABB T-MAC Plus. This issue affects T-MAC Pl
CVE-2025-14773 HIGH 8.0 DOWNGRADE Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in ABB T-MA

References

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