Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2025-2523 is a critical-severity Wrap or Wraparound (CWE-191) vulnerability. Its CVSS base score is 9.4 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 49% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
The vulnerability CVE-2025-2523 is an integer underflow (CWE-191) in the Control Data Access (CDA) component of Honeywell Experion PKS and OneWireless WDM. Affected products include C300 PCNT02, C300 PCNT05, FIM4, FIM8, UOC, CN100, HCA, C300PM, and C200E controllers running Experion PKS versions 520.1 through 520.2 TCU9 and 530 through 530 TCU3, as well as OneWireless WDM versions 322.1 through 322.4 and 330.1 through 330.3. The flaw can produce a communication channel manipulation condition during subtraction operations.
An unauthenticated remote attacker can exploit the issue over the network without user interaction to achieve remote code execution, with impacts on confidentiality, integrity, and availability reflected in the CVSS 9.4 score.
Honeywell advisory guidance directs users to apply the specified hotfixes and version upgrades—Experion PKS 520.2 TCU9 HF1 or 530.1 TCU3 HF1 and OneWireless WDM 322.5 or 331.1—to remediate the vulnerability.
EPSS remains low and unchanged at a peak of 0.0118, indicating no material increase in observed exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21063
Vulnerability Data
The Honeywell Experion PKS and OneWireless WDM contains an Integer Underflow vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which could result in a failure during subtraction…
more
allowing remote code execution. Honeywell recommends updating to the most recent version of Honeywell Experion PKS:520.2 TCU9 HF1 and 530.1 TCU3 HF1 and OneWireless: 322.5 and 331.1. The affected Experion PKS products are C300 PCNT02, C300 PCNT05, FIM4, FIM8, UOC, CN100, HCA, C300PM, and C200E. The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3. The OneWireless WDM affected versions are 322.1 through 322.4 and 330.1 through 330.3.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and static/dynamic analysis directly find integer underflow defects before code is released.
Security engineering principles require use of safe arithmetic constructs or language features that structurally eliminate integer underflow during subtraction.
Input validation can reject or sanitize values that would cause a subtraction to underflow the representable range.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly prevent integer underflow defects via input validation, bounds checking, and static analysis.
Vulnerability scanning and code analysis can surface underflow flaws after they are introduced.
Routine patching can remediate known underflow bugs once they are discovered in deployed software.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing in development catches integer underflow defects before release.
Secure development lifecycle mandates input validation and arithmetic checks that prevent integer underflow.
Application security requirements include bounds checking and safe arithmetic to avoid underflow conditions.
Secure architecture principles require defensive coding patterns that mitigate integer wraparound risks.
Secure coding standards directly prescribe safe integer handling and overflow/underflow prevention.