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Apple has issued urgent security updates to fix a zero-day vulnerability that is being actively exploited, warning that attackers may have used it in targeted campaigns.
CVE-2025-43300 is a flaw in Apple’s Image I/O framework that allows out-of-bounds writing, affecting how applications manage common image file formats.
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According to Apple’s advisory:
“Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.”
The vulnerability lets attackers create harmful image files that, when used by a vulnerable application, could cause memory corruption. This could allow them to execute arbitrary code, leading to surveillance or device compromise.
Apple explained the fix as follows:
“An out-of-bounds write issue was addressed with improved bounds checking. Processing a malicious image file may result in memory corruption.”
The company has released patches across its ecosystem, urging all users to apply them immediately:
iOS 18.6.2 and iPadOS 18.6.2
iPadOS 17.7.10
macOS Sequoia 15.6.1
macOS Sonoma 14.7.8
macOS Ventura 13.7.8
This wide coverage underscores how deeply integrated the Image I/O framework is across Apple products.
As is common with zero-day disclosures, Apple has not shared technical details about the exploitation, the identity of the attackers, or the profile of the victims. The zero-day is being leveraged in precision-targeted campaigns, potentially linked to spyware operations or nation-state threat actors.
With CVE-2025-43300 marked as actively exploited, users are strongly advised to:
Update immediately to the latest iOS, iPadOS, and macOS versions.
Be cautious when receiving unexpected images or opening files from untrusted sources.
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