CVE-2025-31277
Apple Multiple Products Buffer Overflow Vulnerability
Apple Multiple Products
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 20 March 2026. US federal agencies were required to remediate it by 3 April 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 1.6%, which is higher than 75.2% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2025-31277 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2025-31277.
What does CVE-2025-31277 affect?
CVE-2025-31277 affects Apple Multiple Products. 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.
How severe is CVE-2025-31277?
CVE-2025-31277 is rated HIGH with a CVSS base score of 8.8. EPSS puts the probability of exploitation in the next 30 days at 1.6%, higher than 75.2% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 3 April 2026.
How should organisations respond to CVE-2025-31277?
Apply the vendor patch for Apple Multiple Products as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.