CVE-2025-7745VulnerabilityPublished 24 Jul 2025

CVE-2025-7745: ABB AC500 V2 · Buffer Over-read

Affects ABB AC500 V2Source CVE Database V5

Not known to be exploited · CVSS 5.8 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

5.8Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 40% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality: Low
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
ABB AC500 V2	Affected =0	Fixed in–

AI-suggested

1. Immediate network segmentation: Isolate ABB AC500 V2 devices from general IT networks and restrict access to trusted management networks only. 2. Implement strict firewall rules and access control lists (ACLs) to limit network exposure of the affected PLCs, allowing only necessary communication from authorized sources. 3. Monitor network traffic for unusual or unauthorized access attempts targeting ABB AC500 V2 devices, using IDS/IPS systems tuned for ICS protocols. 4. Apply vendor patches promptly once available; coordinate with ABB support channels to obtain updates or workarounds. 5. Conduct regular security audits and vulnerability assessments on ICS environments to identify and remediate similar issues proactively. 6. Employ defense-in-depth strategies such as multi-factor authentication for remote access and robust logging to detect potential exploitation attempts. 7. Train ICS operators and security personnel on recognizing signs of exploitation and maintaining secure configurations of PLC devices.

Description

Buffer Over-read vulnerability in ABB AC500 V2.This issue affects AC500 V2: through 2.5.2.

Impact

For European organizations, especially those operating in critical infrastructure sectors such as energy, manufacturing, water treatment, and transportation, this vulnerability poses a risk of information leakage from industrial control systems. Although the vulnerability does not directly allow for system takeover or disruption, the confidentiality breach could facilitate further targeted attacks by revealing sensitive operational details or credentials. The exposure of such information could undermine the security posture of ICS environments, potentially leading to more severe attacks. Given the increasing integration of ICS with corporate networks and remote access capabilities, the risk of exploitation is amplified. The lack of required privileges and user interaction means attackers can attempt exploitation remotely, increasing the threat surface. European organizations relying on ABB AC500 V2 PLCs should consider this vulnerability seriously, as it could be leveraged in multi-stage attacks against critical infrastructure.

CWE-126Buffer Over-read (opens in a new tab)
Variant weakness
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

search.abb.com/library/Download.aspx?DocumentID=3ADR011432&LanguageCode=en&DocumentPartId=&Action=Launch (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Jul 2025, 07:47 UTC

WeaknessesCWE-126

Technical details

References

Community reviews

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