CVE-2021-23555

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

2.87% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 86.6% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/A:H

NVD analysis status

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

Red Hat severity

Moderate. 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

2022-02-11 20:00Z4 YR AGO

Last updated

2024-09-16 17:23Z2 YR AGO

Reserved

2021-01-08

Assigning CNA

snyk

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-562Return of Stack Variable AddressBase

Data version

5.1

Document digest

999c18f779a0ee14fc2c3454850c66230b55883686d5ee11ad45140ef8b2d5a8

• snyk.iohttps://snyk.io/vuln/SNYK-JS-VM2-2309905x_refsource_MISC
• github.comhttps://github.com/patriksimek/vm2/commit/532120d5cdec7da8225fc6242e154ebabc63fe4dx_refsource_MISC