Controller stack overflow when decoding messages from the server

published 2023-07-13 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-28498

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

Controller DoS due to stack overflow when decoding a message from the server.

See Honeywell Security Notification for recommendations on upgrading and versioning.

Vendor advisories

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

cisa ICSA-23-194-06 updated 2023-07-13 cvss 9.8

Honeywell Experion PKS, LX and PlantCruise

Honeywell Experion LX < R520.2 Honeywell Experion PKS < R520.2 Honeywell Experion PlantCruise < R520.2
affected: vendor fix, mitigation “Honeywell recommends users upgrade Experion Platforms to version R520.2. Download information includes the following:”

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

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 20 mo ago (2025-03-05)

Exploit prediction

0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Honeywell C300

Classification

Weakness

CWE-116 Improper Encoding or Escaping of Output
CWE-787 Out-of-bounds Write

References

process.honeywell.com
product

Sources

CVE List CVE-2023-24480
NVD CVE-2023-24480

Fencer Vulns 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