Threats / Apple / CVE-2021-30807
CVE-2021-30807
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Apple Multiple Products vulnerability
Memory corruption in Apple's IOMobileFrameBuffer across iOS, iPadOS, macOS, and watchOS allows local applications to execute arbitrary code with kernel privileges.
Verdict
Today item — known-exploited.
A local attacker can exploit memory corruption in IOMobileFrameBuffer to gain kernel-level code execution. This vulnerability has been observed in active exploitation and affects multiple Apple platforms and devices.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
6 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 2021-11-03).
Probability (EPSS)
EPSS 0.28839 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Apple, Multiple Products. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-787 Out-of-bounds Write — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
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
I craft a malicious application that triggers memory corruption in IOMobileFrameBuffer through crafted input or API calls.
Business
User devices running affected Apple platforms become compromised at the kernel level, enabling complete system control and data theft.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I escalate from user-level code execution to kernel privileges by exploiting the memory corruption flaw in the graphics framework.
Business
Security boundaries between applications and the operating system are bypassed, allowing malware to persist and evade detection mechanisms.
3
Lateral reach — past segmentation narrative 3
Attacker
I distribute the exploit through legitimate app stores or social engineering to reach target users on their personal devices.
Business
Enterprise and consumer trust in Apple's security model is undermined; incident response and remediation costs escalate across affected user base.
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