Is CVE-2025-7745 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-7745 being exploited in the wild.

How severe is CVE-2025-7745?

High severity, with a CVSS score of 5.8, published 26 May 2026.

Is there a fix for CVE-2025-7745?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2025-7745 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2025-7745?

Check whether you run ABB AC500 V2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-7745: ABB AC500 V2 buffer over-read in Modbus server

CVE-2025-7745 · Severity: high · CVSS 5.8 · Published 2026-05-26

ABB AC500 V2 programmable logic controllers (PLCs), which are used to automate industrial processes in sectors like manufacturing and energy, are affected by a data leakage vulnerability. An attacker can send specially crafted network requests to the device to view fragments of previous communications. This could lead to the exposure of sensitive operational data or technical information about the industrial control environment.

Vendors: ABB.

Quick answers

Is CVE-2025-7745 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-7745 being exploited in the wild.
How severe is CVE-2025-7745?: High severity, with a CVSS score of 5.8, published 26 May 2026.
Which products and versions are affected?: ABB AC500 V2 <= 2.5.2.
Is there a fix for CVE-2025-7745?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-7745 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2025-7745?: Check whether you run ABB AC500 V2 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A buffer over-read vulnerability (CWE-126) exists in the Modbus server component of ABB AC500 V2 PLCs. The flaw is triggered when the device receives unsupported Modbus function codes, causing the server to generate invalid responses that append fragments of previous Modbus telegrams stored in memory. An unauthenticated attacker with network access to the Modbus server can exploit this to leak sensitive data from the PLC's communication history. The issue is resolved in AC500 V2 firmware version 2.5.3 and later.

Affected products

ABB AC500 V2 <= 2.5.2

Timeline

2025-07-23: disclosed: Initial vendor advisory release
2026-05-26: advisory: CISA republication of advisory ICSA-26-146-02

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-146-02

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