CVE-2025-31277

Description

The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6, visionOS 2.6, watchOS 11.6. Processing maliciously crafted web content may lead to memory corruption.

CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Mar 20, 2026 Remediation due: Apr 3, 2026

Weakness Type (CWE)

CWE-119 Buffer Overflow

Affected Products

Vendor	Product	Versions
apple	safari	< 18.6
apple	ipados	< 18.6
apple	iphone_os	< 18.6
apple	macos	15.0 — 15.6
apple	tvos	< 18.6
apple	visionos	< 2.6
apple	watchos	< 11.6

References

Advisories & Patches

https://support.apple.com/en-us/124147 https://support.apple.com/en-us/124149 https://support.apple.com/en-us/124152 https://support.apple.com/en-us/124153 https://support.apple.com/en-us/124154 https://support.apple.com/en-us/124155

Other References

http://seclists.org/fulldisclosure/2025/Aug/0 http://seclists.org/fulldisclosure/2025/Jul/30 http://seclists.org/fulldisclosure/2025/Jul/32 http://seclists.org/fulldisclosure/2025/Jul/36 https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/ https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-31277

Frequently Asked Questions

What is CVE-2025-31277? +

The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6, visionOS 2.6, watchOS 11.6. Processing maliciously crafted web content may lead to memory corruption. It has a CVSS v3.1 base score of 8.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2025-31277? +

CVE-2025-31277 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-31277? +

CVE-2025-31277 affects products from apple, specifically: ipados, iphone_os, macos, safari, tvos, visionos, watchos. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-31277? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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