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Apple iOS CVE-2026-112633

| EUVDEUVD-2026-110253 MEDIUM
Out-of-bounds Write (CWE-787)
2026-10-26 apple GHSA-wvfh-jqf3-v66j
6.5
CVSS 3.1 · Vendor: apple
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Deliver crafted image to victim
  2. Exploit
    Victim's app processes the image
  3. Execution
    Out-of-bounds write during image parsing
  4. Impact
    Application terminates unexpectedly (denial of service)

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires a victim on an affected Apple OS (iOS/iPadOS before 26.7.2 or 27.2; macOS before 15.8.2, 26.7.2, or Golden Gate 27.2) to process a maliciously crafted image in a vulnerable app - this image-processing step is the mandatory trigger (UI:R). No authentication or prior privilege is needed (PR:N). The key limiting factors are that the attacker must get the victim to process the malicious image and that the confirmed impact is limited to app termination (availability only, C:N/I:N) rather than code execution or data disclosure, which substantially bounds real-world risk despite the network attack vector.

Impact

Signals are consistent and point to a moderate, non-urgent issue. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, base 6.5) describes a network-reachable, low-complexity flaw that needs user interaction and yields only an availability impact - Apple's description scopes it to 'unexpected app termination' (a crash), with no stated confidentiality or integrity loss. EPSS is low at 0.55% (46th percentile), the CVE is NOT in CISA KEV, and SSVC records Exploitation: none, Automatable: no, Technical Impact: partial, all of which agree that this is not currently being exploited and is not mass-exploitable. The vuln.today decision label is 'this_month,' i.e. routine patching rather than emergency. One point to note: the CWE is CWE-787 (out-of-bounds write), a class that can sometimes be escalated beyond a crash, yet both Apple's description and the CVSS impact metrics confine the consequence to availability (C:N/I:N) - treat code-execution potential as unverified, not confirmed. Overall this is a genuine but lower-priority image-parsing DoS, not a high-CVSS-but-illusory issue nor an active-exploitation emergency.

Exploit ScenarioDerived

An attacker crafts a malformed image and delivers it to a victim through a website, message, or email attachment on an affected Apple device; when the image is processed by a vulnerable app, the out-of-bounds write triggers and the app terminates unexpectedly. No public exploit code or PoC reference is present in the supplied data, and the described outcome is a crash rather than code execution. User interaction (processing the image) is required per the CVSS vector.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.6% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 28, 2026

An out-of-bounds write in Apple's image-processing path causes affected iOS, iPadOS and macOS systems to terminate an application when a maliciously crafted image is processed, giving an attacker a denial-of-service effect against a targeted app. The flaw affects iOS and iPadOS before 26.7.2 and before 27.2, plus macOS Sequoia before 15.8.2, macOS Tahoe before 26.7.2 and macOS Golden Gate before 27.2; no authentication or prior privilege is needed, but a victim must be induced to open the crafted image (UI:R), and the confirmed impact is availability only, with no disclosed code execution or data exposure. EPSS is low at 0.55% (46th percentile), SSVC records no known exploitation and no automatable path, and no public exploit identified at time of analysis; Apple has released fixed versions for every affected branch.

RemediationAI

Install the vendor fixes: iOS 26.7.2 and iPadOS 26.7.2, or iOS 27.2 and iPadOS 27.2; macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, or macOS Golden Gate 27.2, choosing the branch that matches each device's current major version. Apple's release notes for each of the five advisories (support.apple.com/en-us/149227, 149230, 149521, 149522, 149523) are the authoritative upgrade references, and patch data confirms the fix is available from the vendor - there is no vendor-published workaround beyond updating. Treat the fix as this month's maintenance item rather than an emergency: exploitation is not known (SSVC exploitation: none) and EPSS is 0.55%. Until devices are updated, the practical interim control consistent with the confirmed impact is to avoid opening image files from untrusted or unsolicited sources on affected Apple systems, accepting that this only reduces exposure to the user-interaction trigger and does not remove the underlying out-of-bounds write.

Affected VersionsENISA

macOS 0 <27.2
iOS and iPadOS 0 <26.7.2
iOS and iPadOS 0 <27.2
macOS 0 <26.7.2
macOS 0 <15.8.2

Affected Packages

euvd ios_and_ipados fix: 26.7.2, 27.2
euvd macos fix: 15.8.2, 26.7.2, 27.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The issue is a CWE-787 out-of-bounds write in Apple's per-OS image handling code, which Apple addressed by improving bounds checking - the same code base is shared in spirit across iOS/iPadOS and the three macOS release trains, which is why a single fix ships in five advisories. The CPE data confirms the affected surface is the operating systems themselves (cpe:2.3:a:apple:ios_and_ipados and cpe:2.3:a:apple:macos) rather than a discrete third-party library. Per the assessed CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H), the attacker delivers the crafted image remotely and needs only that a user process it in a vulnerable app; the write occurs during that parsing/decoding step, corrupting memory and taking the process down. The precise parsing routine, file format and code path that trigger the overflow are not described in the available sources, and the availability-only metrics indicate the corruption results in termination rather than a demonstrated control-flow hijack. No C2, exfiltration or persistence primitive is described.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (apple) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI 6.5 MEDIUM

Network-delivered crafted image needs no privileges but requires the victim to process it (UI:R); the only described outcome is app termination, so C:N/I:N/A:H.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
CVSS changed
Oct 27, 2026 - 00:24 NVD
6.5 (MEDIUM)
Patch available
Oct 26, 2026 - 21:03 EUVD
CVE Published
Oct 26, 2026 - 20:36 cve.org
MEDIUM 6.5
CVE Published
Oct 26, 2026 - 20:36 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted image may lead to unexpected app termination.

Threat Intelligence Overview

EPSS Score
0.6%
Top 54% exploitable
Prevalence
Ubiquitous
Apple iOS, iPadOS and macOS run on hundreds of millions of devices
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.6%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

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