An arbitrary memory write vulnerability exists in the dual_onsrv.exe module in Honeywell Experion PKS R40x before R400.6, R41x before R410.…

published 2019-04-08 7 y ago modified 2026-06-17 4 mo ago also EUVD-2014-5323

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.5%; EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

An arbitrary memory write vulnerability exists in the dual_onsrv.exe module in Honeywell Experion PKS R40x before R400.6, R41x before R410.6, and R43x before R430.2, that could lead to possible remote code execution or denial of service. Honeywell strongly encourages and recommends all customers running unsupported versions of EKPS prior to R400 to upgrade to a supported version.

Patch / fix

fixed in 1

honeywell experion_process_knowledge_system r400.6, r410.6, r430.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-14-352-01 updated 2025-06-06 cvss 9.3

Honeywell Experion PKS Vulnerabilities

Honeywell Experion PKS R40x <Experion_PKS_R400.6 Honeywell Experion PKS R41x <Experion_PKS_R410.6 Honeywell Experion PKS R43x <Experion_PKS_R430.2
affected: mitigation “Available patches that resolve the vulnerabilities are listed below: Software Downloads: Experion Update Patch R400.6, Experion Update Patch R410.6, Experion Update Patch R430.2” honeywellprocess.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

3.46% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

Honeywell Experion PKS

Classification

Weakness

CWE-123 Write-what-where Condition
CWE-787 Out-of-bounds Write

References

ics-cert.us-cert.gov /advisories/ICSA-14-352-01
mitigation, third-party-advisory, us-government-resource

Sources

CVE List CVE-2014-5435
NVD CVE-2014-5435

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary