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CVE-2025-31277

CISA KEV

Published March 20, 2026 · Updated April 3, 2026

high

What This Means

**CVE-2025-31277: Safari & Apple OS Buffer Overflow** A buffer overflow in Apple Safari and across iOS, iPadOS, macOS, watchOS, visionOS, and tvOS allows remote code execution when users visit malicious websites or process crafted web content. An attacker can corrupt memory to achieve arbitrary code execution with user privileges, potentially compromising device data and enabling lateral movement. **Required Actions:** - Patch all affected Apple devices immediately using the latest OS and Safari updates. - Monitor for exploitation attempts targeting your organization's Apple device fleet. - Enforce web content filtering and consider blocking high-risk sites until patches are deployed. - Review logs for unusual Safari behavior or memory corruption crashes on macOS and iOS endpoints.

Official Description+

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.

Affected Products

VendorProduct
AppleMultiple Products

Patch Status

Patch by 2026-04-03

Recommended Actions

  1. Check if your systems use any of the affected products listed above.
  2. Apply vendor patches immediately if available.
  3. This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
  4. Monitor vendor advisories for updates and additional mitigations.
  5. Review logs for indicators of compromise related to CVE-2025-31277.

Related Coverage

Vvulnerability

CVE-2025-31277: Buffer Overflow in Apple Safari and OS Platforms Enables Remote Code Execution via Malicious Web Content

CVE-2025-31277 is a buffer overflow vulnerability in Apple Safari and across iOS, iPadOS, macOS, watchOS, visionOS, and tvOS that allows an attacker to corrupt memory and achieve remote code execution when a user processes maliciously crafted web content. No authentication or user interaction beyond visiting a malicious URL is required. CISA has added the flaw to its Known Exploited Vulnerabilities catalog with a federal patch deadline of April 3, 2026; all organizations should apply Apple security updates immediately.

CISA KEV·14d ago·3 min read