CVE-2025-43342: Apple Safari vulnerability (CVSS 9.8)

Description

A correctness issue was addressed with improved checks. This issue is fixed in Safari 26, iOS 18.7 and iPadOS 18.7, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Apple Safari< 26.0

Webkitgtk< 2.48.7

Wpewebkit Wpe Webkit< 2.48.7

Apple iPadOS< 18.7

Apple iPhone OS< 18.7

Apple macOS< 26.0

Apple Tvos< 26.0

Apple Visionos< 26.0

Apple Watchos< 26.0

Remediation

Fixed in

Apple Safari≥ 26.0

Webkitgtk≥ 2.48.7

Wpewebkit Wpe Webkit≥ 2.48.7

Apple iPadOS≥ 18.7

Apple iPhone OS≥ 18.7

Apple macOS≥ 26.0

Apple Tvos≥ 26.0

Apple Visionos≥ 26.0

Apple Watchos≥ 26.0

Patch & vendor advisories

References

http://seclists.org/fulldisclosure/2025/Sep/49Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2025/Sep/53Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2025/Sep/57Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2025/Sep/59Mailing ListThird Party Advisory
https://support.apple.com/en-us/125108Release NotesVendor Advisory
https://support.apple.com/en-us/125109Release NotesVendor Advisory
https://support.apple.com/en-us/125110
https://support.apple.com/en-us/125113Release NotesVendor Advisory
https://support.apple.com/en-us/125114Release NotesVendor Advisory
https://support.apple.com/en-us/125115Release NotesVendor Advisory

and 2 more references

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-43342 being actively exploited?

CVE-2025-43342 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.75%.

How severe is CVE-2025-43342?

CVE-2025-43342 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.75% probability of exploitation.

Which products are affected by CVE-2025-43342?

Affected products include Apple Safari, Webkitgtk, Wpewebkit Wpe Webkit, Apple iPadOS, Apple iPhone OS, and 4 more.

How do I fix CVE-2025-43342?

Upgrade affected software to a fixed version, for example Apple Safari 26.0, Webkitgtk 2.48.7, Wpewebkit Wpe Webkit 2.48.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-43342 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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