CVE-2022-3379

Code execution via FNT parser out-of-bounds write

Published Oct 27, 2022 · Updated Apr 16, 2025

Out-of-bounds write in Horner Automation Cscape 9.90 SP7 and earlier allows attackers to execute code via a malicious FNT file. The FNT file parser fails to validate user-supplied data before writing past the end of a memory buffer. A user must open the crafted file; successful exploitation runs code within the Cscape process and can corrupt its memory.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Horner Automation Cscape 9.90 SP7 and earlier allows attackers to execute code via a malicious FNT file. The FNT file parser fails to validate user-supplied data before writing past the end of a memory buffer. A user must open the crafted file; successful exploitation runs code within the Cscape process and can corrupt its memory.

The record

CVE
CVE-2022-3379
Published
Oct 27, 2022
Updated
Apr 16, 2025
Vendor
Horner Automation
Product
Cscape
Classifications
CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 27, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=9.90

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Horner Automation · Cscapeversion=0 <=9.90

Published CVSS scores

7.8ICS-CERTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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