CVE-2021-24032

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 ImpactpartialSuccessful exploitation gives limited 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

0.34% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 28.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-08.

Red Hat severity

Low. 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

2021-03-04 20:15Z5 YR AGO

Last updated

2026-10-08 21:03Z20 DAYS AGO

Reserved

2021-01-13

Assigning CNA

facebook

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-277Insecure Inherited PermissionsVariant
• CWE-276Incorrect Default PermissionsBase

Data version

5.2

Document digest

d152d85728a16f61606fe131131e98e711fa9c5c5f2c8c7d4d85909af879063e

• github.comhttps://github.com/facebook/zstd/issues/2491x_refsource_MISC
• bugs.debian.orghttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519x_refsource_MISC
• www.facebook.comhttps://www.facebook.com/security/advisories/cve-2021-24032x_refsource_MISC