Cognex In-Sight OPC Server - Deserialization of Untrusted Data

published 2022-05-23 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19656

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.9%; EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits: 0; none known

The affected Cognex product, the In-Sight OPC Server versions v5.7.4 (96) and prior, deserializes untrusted data, which could allow a remote attacker access to system level permission commands and local privilege escalation.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-224-01 updated 2021-08-12 cvss 8.8

Cognex In-Sight OPC Server

Cognex In-Sight OPC Server < 5.7.4 (96)
affected: mitigation “Cognex recommends users install Version 5.9.2 or later to mitigate this vulnerability.” support.cognex.com

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: no
Technical impact: total
Assessed: 18 mo ago (2025-04-16)

Exploit prediction

1.89% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

Cognex In-Sight OPC Server

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

cisa.gov /uscert/ics/advisories/icsa-21-224-01
third-party-advisory, us-government-resource

Sources

CVE List CVE-2021-32935
NVD CVE-2021-32935

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.

Summary