Threats / Apple / CVE-2021-30983
CVE-2021-30983
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Apple iOS and iPadOS vulnerability
A buffer overflow in Apple iOS and iPadOS allows applications to execute code with kernel privileges, enabling privilege escalation and system compromise.
Verdict
Today item — known-exploited.
This kernel-level buffer overflow poses significant risk to device security. Active exploitation in the wild demonstrates practical threat. Affected users face potential unauthorized system access and data compromise through malicious applications.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
4 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 2022-06-27).
Probability (EPSS)
EPSS 0.02934 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Apple, iOS and iPadOS. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-119 Memory Buffer Bounds Error — 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 the buffer overflow during normal operation.
Business
User device security is compromised; attacker gains kernel-level code execution capability.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the overflow to escape application sandbox restrictions and access protected system resources.
Business
Device isolation controls fail; sensitive user data and system functions become accessible to untrusted code.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish persistent control by modifying kernel-level system components or installing rootkits.
Business
Long-term device compromise occurs; remediation requires full OS reinstall; user trust in platform security erodes.
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