Emerson DeltaV Missing Authentication for Critical Function

published 2022-01-28 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13081

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits: 0; none known

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

Vendor advisories

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

cisa ICSA-21-355-04 updated 2021-12-21 cvss 6.1

Emerson DeltaV

Emerson DeltaV Distributed Control System Controllers and Workstations
affected: mitigation “DeltaV DCS: Versions 13.3.1, 14.LTS, 14.FP1, 14.FP2, and R6” guardian.emersonprocess.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: partial
Assessed: 18 mo ago (2025-04-17)

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.9	AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

cisa.gov /uscert/ics/advisories/icsa-21-355-04
mitigation, third-party-advisory, us-government-resource

Sources

CVE List CVE-2021-26264
NVD CVE-2021-26264

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