Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2025-2520— Dereferencing of an uninitialized pointer leads to denial of service.

Quick assessment

Affected
Honeywell C300 PCNT02
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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版本存在安全漏洞，该漏洞源于未初始化变量，可能导致拒绝服务。

CVSS 7.5 · High EPSS 0.39% · P31
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-2520

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Dereferencing of an uninitialized pointer leads to denial of service.
Source: CVE Program / CVE List V5
Vulnerability Description
The Honeywell Experion PKS contains an Uninitialized Variable in the common Epic Platform Analyzer (EPA) communications. An attacker could potentially exploit this vulnerability, leading to a Communication Channel Manipulation, which results in a dereferencing of an uninitialized pointer leading to a denial of service. Honeywell recommends updating to the most recent version of Honeywell Experion PKS: 520.2 TCU9 HF1and 530.1 TCU3 HF1. The affected Experion PKS products are C300 PCNT02, EHB, EHPM, ELMM, Classic ENIM, ETN, FIM4, FIM8, PGM, and RFIM. The Experion PKS versions affected are from 520.1 through 520.2 TCU9 and from 530 through 530 TCU3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用未经初始化的变量
Source: CVE Program / CVE List V5
Vulnerability Title
Honeywell Experion PKS 安全漏洞
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版本存在安全漏洞，该漏洞源于未初始化变量，可能导致拒绝服务。
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

Vendor Product Affected Versions CPE Subscribe
Honeywell C300 PCNT02 520.1 ~ 520.2 TCU9 -
Honeywell EHB 520.1 ~ 520.2 TCU9 -
Honeywell EHPM 520.1 ~ 520.2 TCU9 -
Honeywell ELMM 520.1 ~ 520.2 TCU9 -
Honeywell Classic ENIM 520.1 ~ 520.2 TCU9 -
Honeywell ETN 520.1 ~ 520.2 TCU9 -
Honeywell FIM4 520.1 ~ 520.2 TCU9 -
Honeywell FIM8 520.1 ~ 520.2 TCU9 -
Honeywell PGM 520.1 ~ 520.2 TCU9 -
Honeywell RFIM 520.1 ~ 520.2 TCU9 -

II. Public POCs for CVE-2025-2520

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-2520

请登录查看更多情报信息。

Vendor Pages for CVE-2025-2520 (1)

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

CVE-2025-2523 9.4 CRITICAL Lack of buffer clearing before reuse may result in incorrect system behavior.
CVE-2025-2521 8.6 HIGH Lack of indexes’ validation against buffer borders leads to remote code execution.
CVE-2025-3947 8.2 HIGH Integer underflow during processing of short network packets in CDA FTEB responder
CVE-2025-3946 8.2 HIGH Incorrect response generation during FTEB protocol processing
CVE-2025-2522 6.5 MEDIUM Lack of buffer clearing before reuse may result in incorrect system behavior.

IV. Related Vulnerabilities

Same product: C300 PCNT02
Same vendor: Honeywell
Same weakness: CWE-457

V. Comments for CVE-2025-2520

No comments yet

Leave a comment