CVE-2021-26419

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

22.77% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 97.6% 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:H/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

2021-05-11 19:11Z5 YR AGO

Last updated

2024-08-03 20:26Z2 YR AGO

Reserved

2021-01-29

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

cda686caceffd17f3eddc4a45c1ef86cf1bd353ec81af2e4c0834e4eab052249

• portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26419x_refsource_MISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/162570/Internet-Explorer-jscript9.dll-Memory-Corruption.htmlx_refsource_MISC