What is CVE-2021-30666?

CVE-2021-30666 is a vulnerability in Apple Ios. Published 2021-09-08.

Is CVE-2021-30666 known to be exploited?

Yes. CVE-2021-30666 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.

Vulnerability in Apple Ios

CVE-2021-30666

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have be…

EPSS: 0.012 (79.1th percentile) — read the EPSS interpretation.

Affected products

Apple Ios — versions unspecified

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2021-11-17.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

support.apple.com/en-us/HT212341 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-30666?: CVE-2021-30666 is a vulnerability in Apple Ios. Published 2021-09-08.
Is CVE-2021-30666 known to be exploited?: Yes. CVE-2021-30666 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 6 public proof-of-concept repositories are indexed.