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Known exploited vulnerability

CVE-2025-31277

highCVSS 3.1 8.8In CISA KEVEPSS 1.7%Published · Apple

The short answer

CVE-2025-31277 affects Apple Safari and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-03-20: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-119, CWE-120.

Severity

8.8 high

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

Exploited (CISA KEV)

Yes, since Mar 20, 2026

Federal due date Apr 3, 2026

EPSS, next 30 days

1.7%

Higher than 77% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Affected products

Safari, iOS and iPadOS, macOS, tvOS, visionOS, watchOS, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2025-31277 being exploited?

Yes. CISA added CVE-2025-31277 to its Known Exploited Vulnerabilities catalog on 2026-03-20, with a federal remediation due date of 2026-04-03.

How do I fix CVE-2025-31277?

CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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