Cyber Resilience

CVE-2021-30855

Medium

Published: 24 August 2021

Published
24 August 2021
Modified
21 November 2024
KEV Added
Patch
CVSS Score v3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS Score 0.0021 44.1th percentile
Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-30855 is a medium-severity Link Following (CWE-59) vulnerability in Apple Mac Os X. Its CVSS base score is 5.5 (Medium).

Operationally, ranked at the 44.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, iOS 15 and iPadOS 15, watchOS 8, macOS…

more

Big Sur 11.6. An application may be able to access restricted files.

CWE(s)

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

apple
ipados
≤ 14.8
apple
iphone os
≤ 14.8
apple
mac os x
10.15.7 · ≤ 10.15.7
apple
macos
≤ 11.6
apple
tvos
≤ 15.0
apple
watchos
≤ 8.0

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References