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Fencer Intel
medium 5.5

CVE-2021-30833 json

This issue was addressed with improved checks.

published 2021-10-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17750

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
42.7%
EPSS 42.7% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

This issue was addressed with improved checks. This issue is fixed in macOS Monterey 12.0.1. Unpacking a maliciously crafted archive may allow an attacker to write arbitrary files.

Patch / fix

  • Apple macOS 12.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-30833 updated cvss 5.5

xar: unpacking a maliciously crafted archive may allow an attacker to write arbitrary files

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

42.67% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Apple macOS

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.