High severity7.8NVD Advisory· Published Sep 8, 2021· Updated Jun 17, 2026
CVE-2021-1858
CVE-2021-1858
Description
Processing a maliciously crafted image may lead to arbitrary code execution. This issue is fixed in Security Update 2021-002 Catalina, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. An out-of-bounds write issue was addressed with improved bounds checking.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7- Range: <11.3
- Range: <14.5
- Range: <14.5
- Range: unspecified
- Range: unspecified
- Range: unspecified
- Range: unspecified
Patches
Vulnerability mechanics
References
5- support.apple.com/en-us/HT212317nvdVendor Advisory
- support.apple.com/en-us/HT212323nvdVendor Advisory
- support.apple.com/en-us/HT212324nvdVendor Advisory
- support.apple.com/en-us/HT212325nvdVendor Advisory
- support.apple.com/en-us/HT212326nvdVendor Advisory
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