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CVE-2023-5392

C300 information leak due to an analysis feature which allows extracting more memory over the network than required by the function.…

High7.5EPSS 0.48%
Published
Updated
Reserved
Assigned by
Honeywell

Description

C300 information leak due to an analysis feature which allows extracting more memory over the network than required by the function. Honeywell recommends updating to the most recent version of the product. See Honeywell Security Notification for recommendations on upgrading and versioning.

Timeline

  1. ID reserved

    By Honeywell

  2. · 6 months later

    Published

  3. · 4 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-5392, by who scored it
Scored byCVSSScoreVector
HoneywellCNA (assigner)3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVDNVD · Deferred3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (exploitation in 30 days)
0.48% · top 59% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

  • Honeywell · C300

    • affected 520.2 – ≤ 520.2 TCU4
    • affected 510.1 – ≤ 510.2 HF13
    • affected 520.1 – ≤ 520.1 TCU4
    • affected 511.1 – ≤ 511.5 TCU4 HF3

  • Honeywell · C300

    • affected 520.2 – ≤ 520.2 TCU4
    • affected 511.1 – ≤ 511.5 TCU4 HF3
    • affected 520.1 – ≤ 520.1 TCU4

  • Honeywell · C300

    • affected 520.2 – ≤ 520.2 TCU4
    • affected 520.1 – ≤ 520.1 TCU4
    • affected 520.2 TCU4 HFR2 – ≤ 511.5 TCU4 HF3

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .