Threats / Apple / CVE-2021-30883
CVE-2021-30883
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Apple Multiple Products vulnerability
Apple iOS, macOS, watchOS, and tvOS contain a memory corruption vulnerability (CWE-787) enabling remote code execution. Exploitation has been observed in the wild.
Verdict
Today item — known-exploited.
Out-of-bounds write flaw in multiple Apple platforms permits unauthenticated remote attackers to execute arbitrary code without user interaction, posing critical risk to affected device users.
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
10 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 2022-05-23).
Probability (EPSS)
EPSS 0.14721 — 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 input that triggers an out-of-bounds write in vulnerable Apple software.
Business
Attackers gain arbitrary code execution on millions of iOS, macOS, watchOS, and tvOS devices globally.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I deliver the exploit remotely via network, email, or web content without requiring user action.
Business
Compromise occurs silently, enabling data theft, surveillance, or lateral movement before detection.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish persistent access or escalate privileges post-exploitation.
Business
Attackers maintain long-term control over user devices and corporate infrastructure relying on Apple platforms.
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