CVE-2021-3690

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.77% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 77.8% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-08-23 15:50Z4 YR AGO

Last updated

2024-08-03 17:01Z2 YR AGO

Reserved

2021-08-09

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.1

Document digest

8e5efc987e9b0886cca117f0161ca9a1041df9ab8afe5f183bad06b2bb247dd0

• issues.redhat.comhttps://issues.redhat.com/browse/UNDERTOW-1935x_refsource_MISC
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1991299x_refsource_MISC
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2021-3690x_refsource_MISC
• github.comhttps://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877x_refsource_MISC