What is CVE-2020-27948?

CVE-2020-27948 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-04-02.

How severe is CVE-2020-27948?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Apple iOS And Ipados

CVE-2020-27948

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in watchOS 7.2, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, iOS 14.3 and iPadOS 14.3, tvOS 14.3. Processing a maliciously crafted audio file may lead to arbitrary code execution.

Vulnerability class: Buffer Overflow

Published 2021-04-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.6th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Apple iOS And Ipados — versions unspecified
Apple Ipados
Apple Iphone OS
Apple macOS — versions unspecified
Apple Mac OS X — versions 10.14.6, 10.15.7
Apple tvOS — versions unspecified
Apple watchOS — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

support.apple.com/en-us/HT212011 (Vendor Advisory)
support.apple.com/en-us/HT212003 (Vendor Advisory)
support.apple.com/en-us/HT212005 (Vendor Advisory)
support.apple.com/en-us/HT212009 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-27948?: CVE-2020-27948 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-04-02.
How severe is CVE-2020-27948?: High severity. CVSS v3 base score is 7.8 out of 10.