Apple’s latest iOS update tackles the Wi-Fi connection problems on the iPhone 17 and fixes a font-related security flaw that could crash apps.
On Monday, the company released iOS 26.0.1, which contains bug fixes for the latest iPhone 17 models. The update promises to address user complaints about the newest iPhones mysteriously disconnecting from Wi-Fi without reason.
In the release notes, Apple acknowledged the issue, saying iOS 26.0.1 is designed to fix how “Wi-Fi and Bluetooth may occasionally disconnect on iPhone 17, iPhone Air, and iPhone 17 Pro Models.”
The same release notes also say that a “small number of iPhone users” might’ve been unable to connect to a cellular network following the iOS 26 update. iOS 26.0.1 should fix the problem. In addition, the update resolves an issue where “photos taken under certain lighting conditions” with the iPhone 17 models could include unexpected artifacts.
The other notable fix is for a security-related flaw, dubbed CVE-2025-43400. The company has discovered that a mysterious font could be used to crash an iOS app and potentially tamper with the system memory.
Apple hasn’t provided more details, including the type of font the threat involved. The company merely wrote: “Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.”
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The company’s release notes doesn’t mention any hackers exploiting the flaw. So it looks like Apple itself discovered the threat and patched it. The vulnerability brings to mind another font-related flaw found in 2018 involving a symbol in the Indian language known as Telugu, which could crash or freeze iOS.
Apple is also addressing CVE-2025-43400 through software updates for iPadOS, macOS, VisionOS and for older iPhones still on iOS 18.
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About Our Expert
Michael Kan
Senior Reporter
Experience
I’ve been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I’m currently based in San Francisco, but previously spent over five years in China, covering the country’s technology sector.
Since 2020, I’ve covered the launch and explosive growth of SpaceX’s Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I’ve combed through FCC filings for the latest news and driven to remote corners of California to test Starlink’s cellular service.
I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. Earlier this year, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.
I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I’m now following how President Trump’s tariffs will affect the industry. I’m always eager to learn more, so please jump in the comments with feedback and send me tips.
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