Page generated: 10 Nov 2026, 18:24 UTC
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CVE-2023-28206

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Monterey 12.6.5, iOS 16.4.1 and iPadOS 16.4.1, macOS Ventura 13.3.1, iOS 15.7.5 and iPadOS 15.7.5, macOS Big Sur 11.7.6. An app may be able to execute arbitrary code with kerne…

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An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Monterey 12.6.5, iOS 16.4.1 and iPadOS 16.4.1, macOS Ventura 13.3.1, iOS 15.7.5 and iPadOS 15.7.5, macOS Big Sur 11.7.6. An app may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.
CVSS 8.6 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.4/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.6: +1.29
  • Fresh EPSS: 23.21%: +0.12

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 12 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

The Hacker News
Press · 07 Feb 2024, 08:00 · Global Coalition and Tech Giants Unite Against Commercial Spyware Abuse - The Hacker News
Kaspersky
Press · 17 Apr 2023, 07:00 · Urgent updates for iPhone — to iOS 16.4.1, and Mac — to macOS 13.3.1 - Kaspersky
The Hacker News
Press · 15 Apr 2023, 07:00 · Google Releases Urgent Chrome Update to Fix Actively Exploited Zero-Day Vulnerability - The Hacker News
Bitdefender
Press · 11 Apr 2023, 07:00 · Got an Older iPhone? Update to iOS 15.7.5 Now - Bitdefender
Bitdefender
Press · 11 Apr 2023, 07:00 · Got an Older iPhone? Update to iOS 15.7.5 Now - Bitdefender
See all 12 source documents
Macworld
Press · 10 Apr 2023, 07:00 · iOS 15.7.5 patches two zero-day flaws for older iPhones - Macworld
The Hacker News
Press · 10 Apr 2023, 07:00 · CISA Warns of 5 Actively Exploited Security Flaws: Urgent Action Required - The Hacker News
Bitdefender
Press · 10 Apr 2023, 07:00 · Hackers Exploiting Two New Zero-Days in iOS 16 and macOS Ventura - Patch Now! - Bitdefender
Macworld
Press · 10 Apr 2023, 07:00 · Apple releases macOS Big Sur 11.7.6 and Monterey 12.6.5 with critical security updates - Macworld
Macworld
Press · 07 Apr 2023, 07:00 · macOS Ventura 13.3.1 update brings big security updates and small bug fixes - Macworld
SecurityWeek
Press · 07 Apr 2023, 07:00 · Apple Ships Urgent iOS Patch for Newly Exploited Zero-Days - SecurityWeek
9to5Mac
Press · 07 Apr 2023, 07:00 · PSA: iOS 16.4.1 and macOS 13.3.1 patch two ‘actively exploited’ security vulnerabilities - 9to5Mac

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.4 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 8.6; EPSS 23.2%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, no prior privileges, user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:52.927189+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
07 Apr 2023, 07:00
Published
10 Apr 2023, 00:00
Added to the CISA KEV catalog
10 Apr 2023, 00:00
Latest press mention
07 Feb 2024, 08:00
Score calculated
05 Nov 2026, 13:58