How severe is CVE-2014-5435?

CVE-2014-5435 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2014-5435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-5435?

CVE-2014-5435 affects Honeywell Experion Process Knowledge System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2014-5435?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2014-5435 published?

CVE-2014-5435 was published on 2019-04-08 and last updated on 2026-06-17.

CVE-2014-5435

CVE-2014-5435 is a critical-severity vulnerability in Honeywell Experion Process Knowledge System with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Honeywell Experion Process Knowledge System
Published: 2019-04-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2014-5435?: 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.
How severe is CVE-2014-5435?: CVE-2014-5435 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2014-5435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-5435?: CVE-2014-5435 affects Honeywell Experion Process Knowledge System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2014-5435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2014-5435 published?: CVE-2014-5435 was published on 2019-04-08 and last updated on 2026-06-17.

References

https://ics-cert.us-cert.gov/advisories/ICSA-14-352-01

Affected products (1)

cpe:2.3:a:honeywell:experion_process_knowledge_system:*:*:*:*:*:*:*:*

More vulnerabilities in Honeywell Experion Process Knowledge System

CVE-2014-9186 — Critical (CVSS 9.8): A file inclusion vulnerability exists in the confd.exe module in Honeywell Experion PKS R40x before R400.6, R41x before…
CVE-2014-9189 — Critical (CVSS 9.8): Multiple stack-based buffer overflow vulnerabilities were found in Honeywell Experion PKS all versions prior to R400.6,…
CVE-2014-9187 — Critical (CVSS 9.8): Multiple heap-based buffer overflow vulnerabilities exist in Honeywell Experion PKS all versions prior to R400.6, all…
CVE-2014-5436 — High (CVSS 7.5): A directory traversal vulnerability exists in the confd.exe module in Honeywell Experion PKS R40x before R400.6, R41x…
CVE-2016-8344 — Low (CVSS 3.7): An issue was discovered in Honeywell Experion Process Knowledge System (PKS) platform: Experion PKS, Release 3xx and…

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