HOMEVULNERABILITIESCVE-2025-43343
CRITICAL

CVE-2025-43343

CWE-119Published: September 15, 2025· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

The issue was addressed with improved memory handling. This issue is fixed in Safari 26, 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.

NVD Source

Technical Analysis

CVE-2025-43343 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Apple7 product(s)
safariipadosiphone osmacostvosvisionoswatchos
webkitgtk1 product(s)
webkitgtk
wpewebkit1 product(s)
wpe webkit
Source: NVD CPE · 9 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://support.apple.com/en-us/125108
ADVISORYhttps://support.apple.com/en-us/125113
ADVISORYhttps://support.apple.com/en-us/125114
ADVISORYhttps://support.apple.com/en-us/125115
ADVISORYhttps://support.apple.com/en-us/125116
ADVISORYhttp://seclists.org/fulldisclosure/2025/Sep/49
ADVISORYhttp://seclists.org/fulldisclosure/2025/Sep/53
ADVISORYhttp://seclists.org/fulldisclosure/2025/Sep/57
ADVISORYhttp://seclists.org/fulldisclosure/2025/Sep/59
ADVISORYhttp://www.openwall.com/lists/oss-security/2025/10/13/4

All References (15)

→
https://support.apple.com/en-us/125108Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/125110
→
https://support.apple.com/en-us/125113Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/125114Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/125115Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/125116Release Notes · Vendor Advisory
→
http://seclists.org/fulldisclosure/2025/Sep/49Mailing List · Third Party Advisory
→
http://seclists.org/fulldisclosure/2025/Sep/53Mailing List · Third Party Advisory
→
http://seclists.org/fulldisclosure/2025/Sep/57Mailing List · Third Party Advisory
→
http://seclists.org/fulldisclosure/2025/Sep/59Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2025/10/13/4Mailing List · Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2025:19946
→
https://security-tracker.debian.org/tracker/CVE-2025-43343
→
https://ubuntu.com/security/CVE-2025-43343
→
https://webkitgtk.org/security/WSA-2025-0007.html

Quick Facts

CVE IDCVE-2025-43343
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-119
CISA KEVNo
Affected3 vendor(s)
PublishedSep 15, 2025

Related CVEs (CWE-119)

CVE-2008-0067
10.0
CVE-2009-3999
10.0
CVE-2010-3187
10.0
CVE-2009-3849
10.0
CVE-2009-3699
10.0
CVE-2009-1227
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2025-43343 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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