CVE-2021-3757

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

1.66% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 76.5% 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

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

2021-09-02 12:06Z5 YR AGO

Last updated

2024-08-03 17:09Z2 YR AGO

Reserved

2021-08-31

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')Variant
• CWE-915Improperly Controlled Modification of Dynamically-Determined Object AttributesBase

Data version

5.1

Document digest

62172af8027b8ed6e945edee95023f5e7fb1fc9deeb5553d8b2d6d592d7aab99

• github.comhttps://github.com/immerjs/immer/commit/fa671e55ee9bd42ae08cc239102b665a23958237x_refsource_MISC
• huntr.devhttps://huntr.dev/bounties/23d38099-71cd-42ed-a77a-71e68094adfax_refsource_CONFIRM