CVE-2021-26264

mediumpriority · track · 22OT risk · elevatedEPSS 0.002 · 8 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.19% (8th) EPSS

CVSS 4.9 · medium

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

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

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationDeltaV Distributed Control System Controllers and Workstationscisa_csaf_ot
DeltaV DCS: Versions 13.3.1, 14.LTS, 14.FP1, 14.FP2, and R6

cvss

Technical severity, 0–10. One row per scoring source.

6.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.9mediumAV:L/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 6.9

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.06.1mediumCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · CISA US

v3.16.1mediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.16.1mediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ics-cert@hq.dhs.gov USexploitability 1.6 · impact 4

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USprimaryCWE-306US

affected products (5)

Products and version ranges known to be affected.

DeltaV Distributed Control System Controllers and Workstations: All versionsall versionscisa_csaf_otUS
Emerson DeltaV Distributed Control System Controllers and Workstationsall versionscisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
emerson deltav distributed control systemall versionsnvdUScpe:2.3:o:emerson:deltav_distributed_control_system:*:*:*:*:*:*:*:*
emerson deltav workstationall versionsnvdUScpe:2.3:a:emerson:deltav_workstation:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-355-04Emerson DeltaV2021-12-21icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to achieve local privilege escalation or restart a controller, resulting in a denial-of-service condition.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2022-01-28modified 2026-06-17

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references (7)

External citations — patches, advisories, analysis.

scry

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