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CVE-2025-2521— Lack of indexes’ validation against buffer borders leads to remote code execution.

CVSS 8.6 · High EPSS 1.18% · P79
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I. Basic Information for CVE-2025-2521

Vulnerability Information
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Vulnerability Title
Lack of indexes’ validation against buffer borders leads to remote code execution.
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Honeywell Experion PKS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Honeywell Experion PKS是美国霍尼韦尔（Honeywell）公司的一个过程自动化系统。 Honeywell Experion PKS 520.1至520.2 TCU9和530至530 TCU3版本和OneWireless WDM 322.1至322.4和330.1至330.3版本存在安全漏洞，该漏洞源于内存缓冲区漏洞，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
HoneywellC300 PCNT02 520.1 ~ 520.2 TCU9 -
HoneywellC300 PCNT05 520.1 ~ 520.2 TCU9 -
HoneywellFIM4 520.1 ~ 520.2 TCU9 -
HoneywellFIM8 520.1 ~ 520.2 TCU9 -
HoneywellUOC 520.1 ~ 520.2 TCU9 -
HoneywellCN100 520.1 ~ 520.2 TCU9 -
HoneywellHCA 520.1 ~ 520.2 TCU9 -
HoneywellC300PM 520.1 ~ 520.2 TCU9 -
HoneywellC200E 520.1 ~ 520.2 TCU9 -
HoneywellWireless Device Manager 322.1 ~ 322.4 -

II. Public POCs for CVE-2025-2521

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III. Intelligence Information for CVE-2025-2521

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Same Patch Batch · Honeywell · 2025-07-10 · 6 CVEs total

CVE-2025-25239.4 CRITICALLack of buffer clearing before reuse may result in incorrect system behavior.
CVE-2025-39478.2 HIGHInteger underflow during processing of short network packets in CDA FTEB responder
CVE-2025-39468.2 HIGHIncorrect response generation during FTEB protocol processing
CVE-2025-25207.5 HIGHDereferencing of an uninitialized pointer leads to denial of service.
CVE-2025-25226.5 MEDIUMLack of buffer clearing before reuse may result in incorrect system behavior.

IV. Related Vulnerabilities

Same product: C300 PCNT02
Same vendor: Honeywell
Same weakness: CWE-119

V. Comments for CVE-2025-2521

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