HIGHCVSS v3.1 8.8Actively exploited · CISA KEV since 2021-11-03Vulnerability
CVE-2021-30858
Apple iOS, iPadOS, and macOS WebKit contain a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Properties
- Euvd product
- macOS, IOS
- Vulnerability name
- Apple iOS, iPadOS, macOS Use-After-Free Vulnerability
- First seen
- 2025-10-21T23:25:37+00:00
- Cvss score
- 8.8
- Epss score
- 0.13379
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2021-11-17
- Euvd assigner
- apple
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Exploited euvd since
- 2021-11-03T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2021-11-03
- Score
- 8.8
- Euvd base score version
- 3.1
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Apple, Cisco
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 8.8
Related Entities (10)
AFFECTS_PRODUCT (7)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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