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CVE Record

CVE-2026-20605: The issue was addressed with improved memory handling.

The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3. An app may be able to crash a system process.

MediumCVSS 4.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-20605 is an Apple memory-handling flaw where an app may crash a system process. Apple fixed it in listed iOS, iPadOS, and macOS releases. Business impact is primarily availability disruption on affected Apple endpoints, not documented data theft or privilege escalation.

Executive priority

Treat as routine-to-priority patching for Apple fleets. The known impact is system process crashes, so prioritize devices supporting critical operations, executives, kiosks, and shared workstations. There is no source-backed evidence of active exploitation.

Technical view

Apple describes this as a memory-handling issue, mapped to CWE-119. The CVSS 3.1 score is 4.6 with high availability impact and no confidentiality or integrity impact. The listed vector indicates physical attack vector, low complexity, no privileges, and no user interaction.

Likely exposure

Exposure is limited to Apple iOS, iPadOS, and macOS systems running versions earlier than the fixed releases: iOS/iPadOS 18.7.5, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, and macOS Tahoe 26.3.

Exploitation context

The provided sources do not indicate active exploitation, and this CVE is not marked in KEV. Apple states only that an app may be able to crash a system process. No public exploit details are included in the source bundle.

Researcher notes

Evidence is sparse. Apple’s advisory states the issue was addressed with improved memory handling and that an app may crash a system process. The CVSS vector suggests constrained access conditions. No affected component name, crash details, or exploitability evidence is provided.

Mitigation direction

  • Update iPhones and iPads to iOS/iPadOS 18.7.5 or later.
  • Update macOS Sequoia systems to 15.7.4 or later.
  • Update macOS Sonoma systems to 14.8.4 or later.
  • Update macOS Tahoe systems to 26.3 or later.
  • Review Apple security advisories for environment-specific deployment notes.

Validation and detection

  • Inventory Apple endpoints and record OS major and minor versions.
  • Confirm managed devices report the fixed versions or later.
  • Check MDM compliance policies for minimum required OS versions.
  • Review update failures and prioritize devices with repeated deferrals.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-119: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-20605 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.6 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.6CVSS 3.1MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H0.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.6Medium
CVSS 3.1 vector shape for CVE-2026-20605Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
AppleiOS and iPadOS0Listed
ApplemacOS0, 0, 0Listed
Weakness

CWE details

CWE-119

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.