High severity · published Jul 10, 2025
CVE-2025-2520
Dereferencing of an uninitialized pointer leads to denial of service.
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CP
C300 PCNT02 · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
CE
Classic ENIM · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
EH
EHB · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
EH
EHPM · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
EL
ELMM · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
ET
ETN · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
FI
FIM4 · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
FI
FIM8 · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
PG
PGM · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
RF
RFIM · Honeywell
520.1 through 520.2 TCU9; 530 through 530 TCU3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-2520
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-2520
process.honeywell.com
https://process.honeywell.com/
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