CVE-2021-32995

Code execution via project-file out-of-bounds write

Published Aug 25, 2021 · Updated Aug 3, 2024

Out-of-bounds write in Horner Automation Cscape before 9.90 SP5 allows context-dependent attackers to execute code through a crafted project file. The project-file parser fails to validate user-supplied data before writing it beyond the intended buffer. A user must open the malicious file; successful exploitation runs code with the privileges of the Cscape process.

CVSS severity7.8
High
EPSS probability1.00%
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 before 9.90 SP5 allows context-dependent attackers to execute code through a crafted project file. The project-file parser fails to validate user-supplied data before writing it beyond the intended buffer. A user must open the malicious file; successful exploitation runs code with the privileges of the Cscape process.

The record

CVE
CVE-2021-32995
Published
Aug 25, 2021
Updated
Aug 3, 2024
Vendor
Horner Automation
Product
Cscape
Classifications
CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=All Versions prior to 9.90 SP5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Horner Automation · Cscapeversion=All Versions prior to 9.90 SP5

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1204.002Malicious 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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