CVE-2020-17131

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

1.89% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 78.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2020-12-09 23:36Z5 YR AGO

Last updated

2026-06-09 18:08Z2 MO AGO

Reserved

2020-08-04

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

Medium (CVSS 4.2)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

04b88232c218dbf1d4b2d5b4d8a0a0d5c4806032fa683e1bd77aaf34ba8ab5b2

• msrc.microsoft.comChakra Scripting Engine Memory Corruption Vulnerabilityhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17131vendor-advisorypatch
• portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17131x_refsource_MISC