What is CVE-2020-13520?

CVE-2020-13520 is a high-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2020-12-11.

How severe is CVE-2020-13520?

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

Buffer overflow in Apple macOS

CVE-2020-13520

An out of bounds memory corruption vulnerability exists in the way Pixar OpenUSD 20.05 reconstructs paths from binary USD files. A specially crafted malformed file can trigger an out of bounds memory modification which can result in remote code execution. To trigger this vulnerability, victim needs to access an attacker-provided malformed file.

Vulnerability class: Buffer Overflow

Published 2020-12-11 · 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: 0.021 (81.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.021 · change: +0.001

Affected products

Apple macOS
Pixar Openusd — versions 20.05
Pixar — versions Pixar OpenUSD 20.05 (tested in Apple macOS Catalina 10.15.3)

Weakness classification (CWE)

References

talosintelligence.com/vulnerability_reports/TALOS-2020-1120 (Technical Description, Exploit, Third Party Advisory)
support.apple.com/kb/HT212011 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-13520?: CVE-2020-13520 is a high-severity vulnerability in Apple macOS, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2020-12-11.
How severe is CVE-2020-13520?: High severity. CVSS v3 base score is 7.8 out of 10.