Threats / Apple / CVE-2023-23529
CVE-2023-23529
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Apple Multiple Products vulnerability
Type confusion vulnerability in WebKit affecting Apple iOS, macOS, Safari, and iPadOS. Maliciously crafted web content can trigger code execution. Exploited in the wild.
Verdict
Today item — known-exploited.
A type confusion flaw in WebKit allows remote code execution through malicious web content. The vulnerability affects multiple Apple platforms and any third-party products using WebKit for HTML processing. Active exploitation confirmed.
CISA KEV Yes · 2023-02-144EPSS 0.09502 (verify live)5CVSS 8.8 (CISA)3CISA SSVC Exploitation: active · Automatable: no · Impact: total3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
7 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-02-14).
Probability (EPSS)
EPSS 0.09502 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) · Affected: Apple, Multiple Products. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-843 Type Confusion — weakness family: Memory safety.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog the same day the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
Craft malicious web content that exploits type confusion in WebKit's HTML parsing logic to achieve arbitrary code execution on the target device.
Business
Users visiting compromised or attacker-controlled websites face immediate risk of device compromise and data theft without requiring user interaction beyond normal browsing.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
Distribute the malicious content through compromised legitimate websites, advertising networks, or social engineering to maximize victim reach across iOS, macOS, and Safari users.
Business
Large-scale device compromise across Apple's user base creates reputational damage, support burden, and potential regulatory scrutiny regarding platform security.
3
Lateral reach — past segmentation narrative 3
Attacker
Establish persistent access or lateral movement from compromised devices to corporate networks and sensitive systems.
Business
Enterprise customers face elevated risk of data exfiltration, intellectual property theft, and operational disruption from compromised employee devices.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05