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Known exploited vulnerability

CVE-2021-30900

highCVSS 3.1 7.8In CISA KEVEPSS 5.2%Published · Apple

The short answer

CVE-2021-30900 affects Apple iOS and iPadOS and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-03-30: attackers are using it, so patch it first.

What it is

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.

Weakness: CWE-787.

Severity

7.8 high

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Mar 30, 2023

Federal due date Apr 20, 2023

EPSS, next 30 days

5.2%

Higher than 93% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply updates per vendor instructions.

Affected products

iOS and iPadOS. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2021-30900 being exploited?

Yes. CISA added CVE-2021-30900 to its Known Exploited Vulnerabilities catalog on 2023-03-30, with a federal remediation due date of 2023-04-20.

How do I fix CVE-2021-30900?

CISA's required action: Apply updates per vendor instructions.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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