CVE-2021-32935Network attack vector

System-level command access via untrusted deserialization

Published May 23, 2022 · Updated Apr 16, 2025

Unsafe deserialization in Cognex In-Sight OPC Server 5.7.4 (96) and earlier allows remote attackers to access system-level commands. The server deserializes attacker-controlled data, but public records do not identify the input channel, serialized type, or deserialization routine. Exploitation requires user interaction and can elevate execution to local system privileges, compromising the host's data and availability.

CVSS severity8.8
High
EPSS probability1.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Cognex In-Sight OPC Server 5.7.4 (96) and earlier allows remote attackers to access system-level commands. The server deserializes attacker-controlled data, but public records do not identify the input channel, serialized type, or deserialization routine. Exploitation requires user interaction and can elevate execution to local system privileges, compromising the host's data and availability.

The record

CVE
CVE-2021-32935
Published
May 23, 2022
Updated
Apr 16, 2025
Vendor
Cognex
Product
In-Sight OPC Server
Classifications
CWE-502, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 23, 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=All <=v5.7.4 (96)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cognex · In-Sight OPC Serverversion=All <=v5.7.4 (96)

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
8.8ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1068Exploitation for Privilege Escalation

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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