CVE-2020-27935

MEDIUMNVD 6.36.3—Elevated

6.3

Multiple issues were addressed with improved logic. This issue is fixed in iOS 14.2 and iPadOS 14.2, macOS Big Sur 11.0.1, watchOS 7.1, tvOS 14.2. A sandboxed process may be able to circumvent sandbox restrictions.

CVSS v3: 6.3
EG Score: 6.3(medium)
EPSS: 90.6%
KEV: Not listed

Published

April 2, 2021

Last Modified

November 21, 2024

References (8)

product-security@applehttps://support.apple.com/en-us/HT211928
product-security@applehttps://support.apple.com/en-us/HT211929
product-security@applehttps://support.apple.com/en-us/HT211930
product-security@applehttps://support.apple.com/en-us/HT211931
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211928
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211929
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211930
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211931

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-29 13:42 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCLIJI32/SnatchBox
First seen Dec 18, 2020
SnatchBox (CVE-2020-27935) is a sandbox escape vulnerability and exploit affecting macOS up to version 10.15.x
Open source ↗

Frequently asked(5)

What is CVE-2020-27935?

CVE-2020-27935 is a medium vulnerability published on April 2, 2021. Multiple issues were addressed with improved logic. This issue is fixed in iOS 14.2 and iPadOS 14.2, macOS Big Sur 11.0.1, watchOS 7.1, tvOS 14.2. A sandboxed process may be able to circumvent sandbox restrictions.

When was CVE-2020-27935 disclosed?

CVE-2020-27935 was first published in the National Vulnerability Database on April 2, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-27935 actively exploited?

CVE-2020-27935 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-27935?

CVE-2020-27935 has a CVSS v3 base score of 6.3 (NVD).

How do I remediate CVE-2020-27935?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-27935, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2020-27935

📅 Published

🔄 Last Modified

🔗 References (8)