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Fencer Vulns
critical 9.8

CVE-2023-23585 json

Server DoS due to heap overflow

published 2023-07-13 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-27685

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 51%
public exploits
0
none known

Summary

Experion server DoS due to heap overflow occurring during the handling of a specially crafted message for a specific configuration operation.

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 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

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% 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 Experion Server
  • Honeywell Experion Station
  • Honeywell Engineering Station
  • Honeywell Direct Station

Classification

Weakness

References

Sources

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.