HOMEVULNERABILITIESCVE-2026-20636
MEDIUM

CVE-2026-20636

CWE-119Published: February 11, 2026· Updated: Feb 17, 2026

6.5
CVSS v3.1
EPSS:0.04%probability of exploitation in 30 daysPercentile:11.2th

Official Description

The issue was addressed with improved memory handling. This issue is fixed in iOS 26.3 and iPadOS 26.3, Safari 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.

NVD Source

Technical Analysis

CVE-2026-20636 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

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 InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

Apple5 products
safariipadosiphone osmacosvisionos
Source: NVD CPE · 5 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/126346
ADVISORYhttps://support.apple.com/en-us/126348
ADVISORYhttps://support.apple.com/en-us/126353
ADVISORYhttps://support.apple.com/en-us/126354

All References (4)

→
https://support.apple.com/en-us/126346Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/126348Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/126353Release Notes · Vendor Advisory
→
https://support.apple.com/en-us/126354Release Notes · Vendor Advisory

Quick Facts

CVE IDCVE-2026-20636
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-119
CISA KEVNo
EPSS (30d)0.04%
Affected1 vendor
PublishedFeb 11, 2026

Related CVEs (CWE-119)

CVE-2026-4254
9.8
CVE-2026-3271
9.8
CVE-2026-39892
9.8
CVE-2026-7854
9.8
CVE-2026-7834
9.8
CVE-2026-7853
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-20636 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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