Buffer overflow in Honeywell C200e
CVE-2025-2521
The Honeywell Experion PKS and OneWireless WDM contains a Memory Buffer vulnerability in the component Control Data Access (CDA). An attacker could potentially exploit this vulnerability, leading to an Overread Buffers, which could result in improper index validation against buffer borders leading to 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Honeywell C200e — versions 520.1, 530
- Honeywell C300 Pcnt02 — versions 520.1, 530
- Honeywell C300 Pcnt05 — versions 520.1, 530
- Honeywell C300pm — versions 520.1, 530
- Honeywell Cn100 — versions 520.1, 530
- Honeywell Fim4 — versions 520.1, 530
- Honeywell Fim8 — versions 520.1, 530
- Honeywell Hca — versions 520.1, 530
- Honeywell Uoc — versions 520.1, 530
- Honeywell Wireless Device Manager — versions 322.1, 330.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-2521?
- CVE-2025-2521 is a high-severity vulnerability in Honeywell C200e, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.6/10. Published 2025-07-10.
- How severe is CVE-2025-2521?
- High severity. CVSS v3 base score is 8.6 out of 10.