CVE-2021-1849

HIGHNVD 7.57.5—

7.5

An issue in code signature validation was addressed with improved checks. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. A malicious application may be able to bypass Privacy preferences.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 35.9%
KEV: Not listed

Published

September 8, 2021

Last Modified

November 21, 2024

References (8)

product-security@applehttps://support.apple.com/en-us/HT212317
product-security@applehttps://support.apple.com/en-us/HT212323
product-security@applehttps://support.apple.com/en-us/HT212324
product-security@applehttps://support.apple.com/en-us/HT212325
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212317
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212323
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212324
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT212325

Weakness Classification(1)

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

CWE-347Improper Verification of Cryptographic Signature

Data Freshness Timeline

(refreshed 11× in last 7d / 19× 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.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 10:49 UTCEG score recompute
2026-05-26 10:49 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-1849?

CVE-2021-1849 is a high vulnerability published on September 8, 2021. An issue in code signature validation was addressed with improved checks. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. A malicious application may be able to bypass Privacy preferences.

When was CVE-2021-1849 disclosed?

CVE-2021-1849 was first published in the National Vulnerability Database on September 8, 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-2021-1849 actively exploited?

CVE-2021-1849 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-1849?

CVE-2021-1849 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-1849?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-1849, 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-2021-1849

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-1849?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)