CVE-2021-4435

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 22.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/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

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

2024-02-04 19:16Z2 YR AGO

Last updated

2025-06-17 14:29Z1 YR AGO

Reserved

2024-02-01

Assigning CNA

fedora

Record state

PUBLISHED

Severity

High (CVSS 7.7)

CNA CVSS vector

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

Weaknesses

• CWE-426Untrusted Search PathBase

Data version

5.1

Document digest

5921c7c162e16c2e61ae4a5c0a07831ec4dadf91e23d9a30ab488308fb7ce04f

• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2021-4435vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2262284https://bugzilla.redhat.com/show_bug.cgi?id=2262284issue-trackingx_refsource_REDHAT
• github.comhttps://github.com/yarnpkg/yarn/commit/67fcce88935e45092ffa2674c08053f1ef5268a1
• github.comhttps://github.com/yarnpkg/yarn/releases/tag/v1.22.13