Apple Safari Issue via Malicious Web Content (Fixed in 18.6)
CVE-2025-31277 Published on July 30, 2025
The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, watchOS 11.6, visionOS 2.6, iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6. Processing maliciously crafted web content may lead to memory corruption.
Known Exploited Vulnerability
This Apple Multiple Products Buffer Overflow Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Apple Safari, iOS, watchOS, visionOS, iPadOS, macOS, and tvOS contain a buffer overflow vulnerability that could allow the processing of maliciously crafted web content which may lead to memory corruption.
The following remediation steps are recommended / required by April 3, 2026: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vulnerability Analysis
CVE-2025-31277 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2025-31277 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2025-31277
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Affected Versions
Apple Safari:- Version unspecified and below 18.6 is affected.
- Version unspecified and below 15.6 is affected.
- Version unspecified and below 18.6 is affected.
- Version unspecified and below 2.6 is affected.
- Version unspecified and below 11.6 is affected.
- Version unspecified and below 18.6 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.