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TI-2021-08112 Aliases CVE-2021-26264GHSA-x46h-6fmr-m5fr

Emerson DeltaV Missing Authentication for Critical Function

Priority LOW 26CWE-306Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00187 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:emerson:deltav_workstation:-:*:*:*:*:*:*:*not specified by NVDVulnerableEmerson
cpe:2.3:o:emerson:deltav_distributed_control_system:-:*:*:*:*:*:*:*not specified by NVDVulnerableEmerson
  • cpe:2.3:a:emerson:deltav_workstation:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Emerson
  • cpe:2.3:o:emerson:deltav_distributed_control_system:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Emerson

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26264
  2. 2026-10-03 Alias added: GHSA-x46h-6fmr-m5fr

References

Advisory 1

  • TI-2022-12299 The Emerson DeltaV Distributed Control System (DCS) through 2022-04-29 mishandles… CVSS 3.1HIGH 7.8
  • TI-2022-12306 The Emerson DeltaV Distributed Control System (DCS) controllers and IO cards through… CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences