CVE-2021-20230

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

1.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 65.5% 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:H/I:N/A:N

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

2021-02-23 16:34Z5 YR AGO

Last updated

2024-08-03 17:30Z2 YR AGO

Reserved

2020-12-17

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-295Improper Certificate ValidationBase

Data version

5.1

Document digest

c0bcaa745499afb5264025cc97cd9191afed298fb60937363552714d1e3995fd

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1925226x_refsource_MISC
• github.comhttps://github.com/mtrojnar/stunnel/commit/ebad9ddc4efb2635f37174c9d800d06206f1edf9x_refsource_MISC
• security.gentoo.orgGLSA-202105-02https://security.gentoo.org/glsa/202105-02vendor-advisoryx_refsource_GENTOO