MEDIUM
CVE-2026-43666
Published: May 11, 2026· Updated: May 13, 2026
6.2
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:7.0th
Official Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An attacker on the local network may be able to cause a denial-of-service.
Technical Analysis
CVE-2026-43666 requires local access, meaning attackers must already have a foothold on the target system.
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 availability disruption (denial of service), with a CVSS base score of 6.2.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Apple6 products
ipadosiphone osmacostvosvisionoswatchos
Source: NVD CPE · 6 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
All References (8)
→
https://support.apple.com/en-us/127110Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/127111Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/127115Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/127116Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/127117Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/127118Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/127119Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/127120Release Notes · Vendor Advisory
Quick Facts
CVE IDCVE-2026-43666
CVSS Score6.2 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedMay 11, 2026
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-43666 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.