CVE-2020-20949

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

0.93% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 58.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-09.

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

2021-01-20 15:42Z5 YR AGO

Last updated

2026-07-09 00:09Z1 MO AGO

Reserved

2020-08-13

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-327Use of a Broken or Risky Cryptographic AlgorithmClass

Data version

5.2

Document digest

d6508df0708b54072b6b48ceb47c64087a30d771d99ab714852904378f8d7701

• archiv.infsec.ethz.chhttp://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf
• www.st.comhttps://www.st.com/en/embedded-software/x-cube-cryptolib.html
• bi-zone.medium.comhttps://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb