CVE-2021-30849

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.90% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 78.1% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-10-19 13:11Z4 YR AGO

Last updated

2024-08-03 22:48Z2 YR AGO

Reserved

2021-04-13

Assigning CNA

apple

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

5a480fa5fb5f8be52737b75c8fe2887bea9f30cce42e321cc3a43d37c7a1577a

• support.apple.comhttps://support.apple.com/en-us/HT212807x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212814x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212819x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212815x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212817x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212816x_refsource_MISC
• www.openwall.com[oss-security] 20211026 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006http://www.openwall.com/lists/oss-security/2021/10/26/9mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20211027 Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006http://www.openwall.com/lists/oss-security/2021/10/27/1mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20211027 Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006http://www.openwall.com/lists/oss-security/2021/10/27/2mailing-listx_refsource_MLIST
• seclists.org20211027 APPLE-SA-2021-10-26-8 Additional information for APPLE-SA-2021-09-20-5 Safari 15http://seclists.org/fulldisclosure/2021/Oct/60mailing-listx_refsource_FULLDISC
• seclists.org20211027 APPLE-SA-2021-10-26-10 Additional information for APPLE-SA-2021-09-20-2 watchOS 8http://seclists.org/fulldisclosure/2021/Oct/62mailing-listx_refsource_FULLDISC
• seclists.org20211027 APPLE-SA-2021-10-26-11 Additional information for APPLE-SA-2021-09-20-3 tvOS 15http://seclists.org/fulldisclosure/2021/Oct/63mailing-listx_refsource_FULLDISC
• seclists.org20211027 APPLE-SA-2021-10-26-9 Additional information for APPLE-SA-2021-09-20-1 iOS 15 and iPadOS 15http://seclists.org/fulldisclosure/2021/Oct/61mailing-listx_refsource_FULLDISC
• www.openwall.com[oss-security] 20211027 Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006http://www.openwall.com/lists/oss-security/2021/10/27/4mailing-listx_refsource_MLIST
• support.apple.comhttps://support.apple.com/kb/HT212869x_refsource_CONFIRM
• support.apple.comhttps://support.apple.com/kb/HT212953x_refsource_CONFIRM