CVE-2021-23191

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

1.10% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 65.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2022-03-02 22:28Z4 YR AGO

Last updated

2024-08-03 19:05Z2 YR AGO

Reserved

2021-04-06

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

72403cd2bc28fc5c92e8881e5ba758f39ac72fdeb6348b3002d3c5347289d991

• github.comhttps://github.com/michaelrsweet/htmldoc/issues/415x_refsource_MISC
• github.comhttps://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdcx_refsource_MISC
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1967022x_refsource_MISC
• ubuntu.comhttps://ubuntu.com/security/CVE-2021-23191x_refsource_MISC