What’s Vulnerable › Vulnerabilities

CVE-2021-26264: Emerson DeltaV Missing Authentication for Critical Function

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-28 · updated 2026-06-17
• Weakness: CWE-306

Description

A specially crafted script could cause the DeltaV Distributed Control System Controllers (All Versions) to restart and cause a denial-of-service condition.

Affected products

• Emerson Deltav Distributed Control System: all versions
• Emerson Deltav Workstation: all versions

References

• https://www.cisa.gov/uscert/ics/advisories/icsa-21-355-04
• https://www.cisa.gov/uscert/ics/advisories/icsa-21-355-04

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