CVE-2021-3597

lowpriority · track · 24EPSS 0.012 · 67 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.16% (67th) EPSS

CVSS 2.6 · low

Is it mine?

29 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-22

A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.

cvss

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

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.6–5.9

v2.02.6lowAV:N/AC:H/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 4.9 · impact 2.9

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-362USprimaryCWE-362US

affected products (29)

Products and version ranges known to be affected.

Dell Data Protection Advisor <19.12 SP 1all versionscert_bundDE
Hitachi Ops Centerall versionscert_bundDEcpe:/a:hitachi:ops_center:-
NetApp ActiveIQ Unified Managerall versionscert_bundDEcpe:/a:netapp:active_iq_unified_manager:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux 6all versionscert_bundDEcpe:/o:redhat:enterprise_linux:6
Red Hat Enterprise Linux 7all versionscert_bundDEcpe:/o:redhat:enterprise_linux:7
Red Hat Enterprise Linux 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:8
Dell Data Protection Advisor< 19.12 SP 1cert_bundDE
Red Hat JBoss Enterprise Application Platform< 7.3.9cert_bundDE
n/a undertow≤ undertow 2.0.35.SP1, undertow 2.2.6.SP1, undertow 2.2.7.SP1, undertow 2.0.36.SP1, undertow 2.2.9.Final, undertow 2.0.39.Finalenisa_euvdEU
netapp active iq unified managerall versionsnvdUScpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:*:*:*
netapp oncommand insightall versionsnvdUScpe:2.3:a:netapp:oncommand_insight:*:*:*:*:*:*:*:*
netapp oncommand workflow automationall versionsnvdUScpe:2.3:a:netapp:oncommand_workflow_automation:*:*:*:*:*:*:*:*
redhat fuse= 1.0nvdUScpe:2.3:a:redhat:fuse:*:*:*:*:*:*:*:*
redhat jboss enterprise application platformall versionsnvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat jboss enterprise application platform= 7.3nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat jboss enterprise application platform= 7.4nvdUScpe:2.3:a:redhat:jboss_enterprise_application_platform:*:*:*:*:*:*:*:*
redhat openshift application runtimesall versionsnvdUScpe:2.3:a:redhat:openshift_application_runtimes:*:*:*:*:*:*:*:*
redhat single sign-onall versionsnvdUScpe:2.3:a:redhat:single_sign-on:*:*:*:*:*:*:*:*
redhat undertow< 2.0.35nvdUScpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*

showing 20 of 29

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-0916Red Hat JBoss Enterprise Application Platform: Mehrere SchwachstellenDeutsch2021-09-08csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in der Red Hat JBoss Enterprise Application Platform ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial of Service Zustand auszulösen und vertrauliche Informationen offenzulegen.
WID-SEC-W-2025-1459Dell Data Protection Advisor: Mehrere SchwachstellenDeutsch2025-07-03csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell Data Protection Advisor ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, und um weitere nicht näher spezifizierte Angriffe durchzuführen.
GHSA-mfhv-gwf8-4m88undertow Race Condition vulnerability2022-05-25ghsa · osvUS
A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2022-05-24modified 2026-06-17

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+4079 more

references (18)

External citations — patches, advisories, analysis.

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