CVE-2025-43209

An out-of-bounds access issue was addressed with improved bounds checking

Critical · published July 29, 2025

CVSS v3.1
9.8
EPSS
1%
Percentile
61.2
In the wild
Unconfirmed
What it is

🚨 An out-of-bounds access issue in Safari means that simply visiting a malicious site could lead to a crash — leaving you stranded in the digital wilderness! 🔥 Think of this like a roller coaster that unexpectedly veers off the track because it missed a safety check — not just a bumpy ride, but a full stop that could leave passengers in a panic! 🎢 An attacker could exploit this vulnerability by crafting malicious web content that, when accessed, causes Safari to crash unexpectedly. This not only disrupts your browsing experience but could lead to potential data loss or compromise, making it crucial to address!

Put simply

Think of this like a roller coaster that unexpectedly veers off the track because it missed a safety check — not just a bumpy ride, but a full stop that could leave passengers in a panic! 🎢 This out-of-bounds access issue arises when Safari fails to properly check the bounds of inputs, allowing unexpected memory access and resulting in crashes.

What to do

An attacker could exploit this vulnerability by crafting malicious web content that, when accessed, causes Safari to crash unexpectedly. This not only disrupts your browsing experience but could lead to potential data loss or compromise, making it crucial to address! Update your devices to iOS 18.6, iPadOS 18.6, or the latest macOS versions provided. It's essential to keep your systems updated to protect against this critical flaw. Don't delay—secure those devices now! 🛡️ You've got this! Follow these steps and you'll have your Safari safe and sound in no time! 😄

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00960 · 61.2th percentile
Published
2025-07-29T23:35Z
EPSS history
Timeline
  • 29 JUL 23:35Z
    An out-of-bounds access issue was addressed with improved bounds checking
    cvelistv5