---
title: Serious iOS and macOS Zero-Day Vulnerabilities Discovered - SIRKit
description: Update your Apple devices now to mitigate recent zero-day vulnerabilities. Install iOS 16.4.1, iPadOS 16.4.1, macOS Ventura 13.3.1, and Safari 16.4.1.
image: https://www.sirkit.ca/hubfs/is-cybersecurity-hard-scaled-1.jpg
---
[Skip to main content](https://www.sirkit.ca/blog/ios-and-macos-vulnerabilities#main-content)
[ ](https://www.sirkit.ca)
- Show submenu for Services Services
- [Managed IT](https://www.sirkit.ca/managed-it-services)
- [Co-Managed IT](https://www.sirkit.ca/co-managed-it-services)
- [Integrated IT Solutions](https://www.sirkit.ca/integrated-it-solutions)
- [Cybersecurity](https://www.sirkit.ca/cybersecurity)
- [Show submenu for About Us About Us](https://www.sirkit.ca/about)
- [Executive Team](https://www.sirkit.ca/about?#exec)
- [Careers](https://www.sirkit.ca/careers)
- [Contact Us](https://www.sirkit.ca/contact)
- [Blog](https://www.sirkit.ca/blog)
Open main navigation
Close main navigation
- Show submenu for Services Services
- Services
- [Managed IT](https://www.sirkit.ca/managed-it-services)
- [Co-Managed IT](https://www.sirkit.ca/co-managed-it-services)
- [Integrated IT Solutions](https://www.sirkit.ca/integrated-it-solutions)
- [Cybersecurity](https://www.sirkit.ca/cybersecurity)
- Show submenu for About Us About Us
- About Us
- [About Us](https://www.sirkit.ca/about)
- [Executive Team](https://www.sirkit.ca/about?#exec)
- [Careers](https://www.sirkit.ca/careers)
- [Contact Us](https://www.sirkit.ca/contact)
- [Blog](https://www.sirkit.ca/blog)
- [Connect with our Team](https://www.sirkit.ca/contact)
[Connect with our Team](https://www.sirkit.ca/contact)
[Skip to main content](https://www.sirkit.ca/blog/ios-and-macos-vulnerabilities#main-content)
This is an announcement bar or top menu bar. Additional content can go here.
[ ](https://www.sirkit.ca)
- Show submenu for Services Services
- [Managed IT](https://www.sirkit.ca/managed-it-services)
- [Co-Managed IT](https://www.sirkit.ca/co-managed-it-services)
- [Integrated IT Solutions](https://www.sirkit.ca/integrated-it-solutions)
- [Cybersecurity](https://www.sirkit.ca/cybersecurity)
- [Show submenu for About Us About Us](https://www.sirkit.ca/about)
- [Executive Team](https://www.sirkit.ca/about?#exec)
- [Careers](https://www.sirkit.ca/careers)
- [Contact Us](https://www.sirkit.ca/contact)
- [Blog](https://www.sirkit.ca/blog)
Open main navigation
Close main navigation
- Show submenu for Services Services
- Services
- [Managed IT](https://www.sirkit.ca/managed-it-services)
- [Co-Managed IT](https://www.sirkit.ca/co-managed-it-services)
- [Integrated IT Solutions](https://www.sirkit.ca/integrated-it-solutions)
- [Cybersecurity](https://www.sirkit.ca/cybersecurity)
- Show submenu for About Us About Us
- About Us
- [About Us](https://www.sirkit.ca/about)
- [Executive Team](https://www.sirkit.ca/about?#exec)
- [Careers](https://www.sirkit.ca/careers)
- [Contact Us](https://www.sirkit.ca/contact)
- [Blog](https://www.sirkit.ca/blog)
- [Get Started](https://www.sirkit.ca/contact)
[Get Started](https://www.sirkit.ca/contact)
Categories
- [Cyber-Security Advisories](https://www.sirkit.ca/blog/tag/cyber-security-advisories)
- [Technical Pro-tips and How-to](https://www.sirkit.ca/blog/tag/technical-pro-tips-and-how-to)
- [Knowledge Base (KB)](https://www.sirkit.ca/blog/tag/knowledge-base-kb)
- [SIRKit News](https://www.sirkit.ca/blog/tag/sirkit-news)
- [Product Reviews](https://www.sirkit.ca/blog/tag/product-reviews)
- [SIRKit360® News](https://www.sirkit.ca/blog/tag/sirkit360-news)
# Serious iOS and macOS Zero-Day Vulnerabilities Discovered
[Kris Wilkinson](https://www.sirkit.ca/blog/author/kris-wilkinson)
Apr 12, 2023
Apple has released emergency security updates to address two zero-day vulnerabilities that have been exploited in recent attacks affecting iPhones, iPads, and Macs. These vulnerabilities could allow attackers to execute arbitrary code with kernel privileges or execute malicious code on iOS and macOS devices.
## What’s the risk?
It is extremely important that you install these emergency updates as soon as possible to prevent potential attacks on your personal and corporate devices. The list of affected devices is extensive and includes the following:
- iPhone 8 and later,
- iPad Pro (all models),
- iPad Air 3rd generation and later,
- iPad 5th generation and later,
- iPad mini 5th generation and later, and
- Macs running macOS Ventura.
Apple released updates for these vulnerabilities, they are fixed in iOS 16.4.1, iPadOS 16.4.1, macOS Ventura 13.3.1, and Safari 16.4.1, with improved input validation and memory management.
## What should you do?
To secure your devices against these vulnerabilities, it’s crucial to install the updates released by Apple as soon as possible. We strongly advise updating all iPhone, iPad, and macOS devices immediately to address the two zero-day vulnerabilities. Please ask your team to update their devices.
This is a serious, wide-reaching issue, and the Cybersecurity and Infrastructure Security Agency (CISA) has issued a directive calling for patching of these vulnerabilities by federal agencies by May 1st, 2023.
- How to update your iPhone or iPad: [Update your iPhone or iPad – Apple Support (CA)](https://support.apple.com/en-ca/HT204204?utm_source=hs_email&utm_medium=email&_hsenc=p2ANqtz-8NO3fRJR4gtkTm4Tgo13FsM77V84TXU3t8tAtGGvRWNCtYM9tEBp11acCUtzp6w4QxxoXJ)
- How to update your macOS: [Update macOS on Mac – Apple Support (CA)](https://support.apple.com/en-ca/HT201541?utm_source=hs_email&utm_medium=email&_hsenc=p2ANqtz-8NO3fRJR4gtkTm4Tgo13FsM77V84TXU3t8tAtGGvRWNCtYM9tEBp11acCUtzp6w4QxxoXJ)
**Important:** Ensure the Apple device is backed up before applying updates. The likelihood of an update causing issues is low, however, you should always backup before applying updates to protect yourself.
**Additional Information:**
- [Back up iPhone – Apple Support (CA)](https://support.apple.com/en-ca/guide/iphone/iph3ecf67d29/ios?utm_source=hs_email&utm_medium=email&_hsenc=p2ANqtz-8NO3fRJR4gtkTm4Tgo13FsM77V84TXU3t8tAtGGvRWNCtYM9tEBp11acCUtzp6w4QxxoXJ)
- [How to back up your Mac – Official Apple Support](https://support.apple.com/en-ca/mac-backup?utm_source=hs_email&utm_medium=email&_hsenc=p2ANqtz-8NO3fRJR4gtkTm4Tgo13FsM77V84TXU3t8tAtGGvRWNCtYM9tEBp11acCUtzp6w4QxxoXJ)
If you have questions or need assistance, please call or e-mail us. If you’re interested in having SIRKit [manage your security](https://www.sirkit.ca/managed-it-services/), please [get in touch](https://www.sirkit.ca/contact/).
**Tags:**
[Cyber-Security Advisories](https://www.sirkit.ca/blog/tag/cyber-security-advisories)
### Related Posts
##### [ Cyber-Security Advisories • May 22, 2026 What Is Agentic AI in Cybersecurity? 6 min read](https://www.sirkit.ca/blog/what-is-agentic-ai-in-cybersecurity)
##### [ Knowledge Base (KB) • Jan 12, 2026 What Does Cyber Insurance Cover 5 min read](https://www.sirkit.ca/blog/what-does-cyber-insurance-cover)
##### [.jpg?width=520&height=294&name=scott-graham-5fNmWej4tAA-unsplash%20(1).jpg) Cyber-Security Advisories • Oct 9, 2025 What is a vCIO? Do you Need One? 2 min read](https://www.sirkit.ca/blog/what-is-vcio)
### Stay connected.
Join our newsletter to stay informed with the latest technology insights, market and business updates, and Sirkit news and events.
###### Categories
- [Cyber-Security Advisories](https://www.sirkit.ca/blog/tag/cyber-security-advisories)
- [Technical Pro-tips and How-to](https://www.sirkit.ca/blog/tag/technical-pro-tips-and-how-to)
- [Knowledge Base (KB)](https://www.sirkit.ca/blog/tag/knowledge-base-kb)
- [SIRKit News](https://www.sirkit.ca/blog/tag/sirkit-news)
- [Product Reviews](https://www.sirkit.ca/blog/tag/product-reviews)
###### Recent Posts
- [6 AI-Related Cybersecurity Risks Businesses Can’t Ignore](https://www.sirkit.ca/blog/ai-related-cyber-risks)
- [What Is Agentic AI in Cybersecurity?](https://www.sirkit.ca/blog/what-is-agentic-ai-in-cybersecurity)
- [AI Cyber Attacks: What Business Leaders Need to Understand Right Now](https://www.sirkit.ca/blog/ai-cyber-attacks-business-leaders)
- [Vulnerability Assessment vs Penetration Testing](https://www.sirkit.ca/blog/vulnerability-assessment-vs-penetration-testing)
- [Why MFA Alone Is No Longer Enough: How to Prevent Token Theft and AiTM Attacks](https://www.sirkit.ca/blog/prevent-token-theft)
[](https://www.sirkit.ca)
[1-780-758-5200](tel:17807585200) (Support)
[1-587-404-9002](https://www.sirkit.ca/blog/15874049002) (Sales)
Unit 217, 236 91 Street SW
Edmonton AB, T6X 1W8
- [Managed IT Services](https://www.sirkit.ca/managed-it-services)
- [Cybersecurity](https://www.sirkit.ca/cybersecurity)
- [About Us](https://www.sirkit.ca/about)
- [Contact Us](https://www.sirkit.ca/contact)
©2026 Sirkit. All rights reserved. [Privacy Policy](https://www.sirkit.ca/privacy-policy) | [Terms of Use](https://www.sirkit.ca/terms-of-use)
Sirkit® is a registered trademark.
-
-
-
×
×
```json
{
"@context" : "https://schema.org",
"@type" : "BlogPosting",
"author" : {
"@type" : "Person",
"name" : "Kris Wilkinson",
"url" : "https://www.sirkit.ca/blog/author/kris-wilkinson"
},
"dateModified" : "2025-05-14T18:31:07.502Z",
"datePublished" : "2023-04-12T16:27:11.000Z",
"headline" : "Serious iOS and macOS Zero-Day Vulnerabilities Discovered - SIRKit",
"image" : [ "https://www.sirkit.ca/hubfs/is-cybersecurity-hard-scaled-1.jpg" ],
"mainEntityOfPage" : {
"@id" : "https://www.sirkit.ca/blog/ios-and-macos-vulnerabilities",
"@type" : "WebPage"
},
"publisher" : {
"@type" : "Organization",
"logo" : {
"@type" : "ImageObject",
"url" : "https://www.sirkit.ca/hubfs/Logos/SirkitBadge%20(2).png"
},
"name" : "Sirkit"
}
}
```