CVE-2020-9920

CRITICALNVD 9.19.1—

9.1

A path handling issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, watchOS 6.2.8. A malicious mail server may overwrite arbitrary mail files.

CVSS v3: 9.1
EG Score: 9.1(medium)
EPSS: 72.4%
KEV: Not listed

Published

October 22, 2020

Last Modified

November 21, 2024

References (6)

product-security@applehttps://support.apple.com/kb/HT211288
product-security@applehttps://support.apple.com/kb/HT211289
product-security@applehttps://support.apple.com/kb/HT211291
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT211288
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT211289
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT211291

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-22Path Traversal

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-07 15:23 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2020-9920?

CVE-2020-9920 is a critical vulnerability published on October 22, 2020. A path handling issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, watchOS 6.2.8. A malicious mail server may overwrite arbitrary mail files.

When was CVE-2020-9920 disclosed?

CVE-2020-9920 was first published in the National Vulnerability Database on October 22, 2020, 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-2020-9920 actively exploited?

CVE-2020-9920 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 72.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-9920?

CVE-2020-9920 has a CVSS v3 base score of 9.1 (NVD).

How do I remediate CVE-2020-9920?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-9920, 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-2020-9920

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-9920?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)