CVE-2025-31277: Apple Multiple Products

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

Yes, if you run Apple Multiple Products. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-03-20, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-04-03; treat that as the outer limit, not the target.
EPSS 1.7%, percentile 76: FIRST’s model estimates a 1.7% chance of exploitation activity in the next 30 days, higher than 76% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.

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.

CISA’s summary

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.

Weakness type: CWE-119, CWE-120.

Product: Apple Multiple Products · Assigned by: apple · Published: 2025-07-29

Affected and fixed versions

Vendor	Product	Affected versions (per CVE record)
Apple	Safari	< 18.6
Apple	iOS and iPadOS	< 18.6
Apple	macOS	< 15.6
Apple	tvOS	< 18.6
Apple	visionOS	< 2.6
Apple	watchOS	< 11.6

Severity scores

Scored by	CVSS	Score	Vector
CISA-ADP	3.1	8.8 High	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
redhat-SADP	3.1	8.8 High	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

Attack vector: network (remotely reachable)
Attack complexity: low
Privileges required: none (no login)
User interaction: required (a user must click/open something)
Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

CISA KEV: added 2026-03-20; federal due date 2026-04-03. Known ransomware use: Unknown.
CISA 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.
CISA SSVC assessment: exploitation active, automatable no, technical impact total.
FIRST EPSS (model of 2026-10-21): 1.66% probability of exploitation activity in the next 30 days; percentile 76.

Timeline

2025-07-29 — CVE record published by apple
2026-03-20 — Added to CISA’s Known Exploited Vulnerabilities catalog
2026-04-03 — CISA remediation deadline for US federal agencies
2026-09-21 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Other references from the CVE record and advisory

support.apple.com support.apple.com
cloud.google.com cloud.google.com
seclists.org seclists.org
seclists.org seclists.org
seclists.org seclists.org
seclists.org seclists.org
access.redhat.com access.redhat.com
RHBZ#2448780 bugzilla.redhat.com
security.access.redhat.com security.access.redhat.com

All exploited Apple vulnerabilities · Today’s Security Digest