CVE-2021-30753
Status: ModifiedMedium (5.5)—
Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. An out-of-bounds read was addressed with improved input validation.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- Base score: 5.5
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.91%
- Percentile among all scored CVEs: 59
- Score date: 10/8/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (5)
CWEs
- CWE-125
References
- https://support.apple.com/en-us/HT212528
- https://support.apple.com/en-us/HT212529
- https://support.apple.com/en-us/HT212532
- https://support.apple.com/en-us/HT212533
- https://support.apple.com/en-us/HT212528
- https://support.apple.com/en-us/HT212529
- https://support.apple.com/en-us/HT212532
- https://support.apple.com/en-us/HT212533
Raw JSON (NVD)
Show
{
"id": "CVE-2021-30753",
"cveTags": [],
"metrics": {
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"vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "MEDIUM",
"availabilityImpact": "NONE",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
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"integrityImpact": "NONE",
"userInteraction": "REQUIRED",
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"affected": [
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"description": [
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"descriptions": [
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"value": "Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5, iOS 14.6 and iPadOS 14.6. An out-of-bounds read was addressed with improved input validation."
},
{
"lang": "es",
"value": "El procesamiento de una fuente maliciosamente diseñada puede resultar en una divulgación de la memoria del proceso. Este problema se corrigió en macOS Big Sur versión 11.4, tvOS versión 14.6, watchOS versión 7.5, iOS versión 14.6 e iPadOS versión 14.6. Se abordó una lectura fuera de límites con una comprobación de entrada mejorada"
}
],
"lastModified": "2026-06-17T03:50:48.907",
"configurations": [
{
"nodes": [
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"sourceIdentifier": "product-security@apple.com"
}