CVE Tools
Sign in

CVE-2021-30952

Published: Aug 24, 2021Updated: Mar 6, 2026 Sources: CVE List NVD BDUCWE-190
7.8HIGH
NVD MITRE
EPSS Score
7.6%
Top 6.1%
CISA KEV
Active Exploitation
Since Mar 5, 2026
Exploits
1 Known
Remediation
Patch Available
Self-Check
OpenVAS

Description

An integer overflow was addressed with improved input validation. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-190

Affected Products

Apple Inc.
commercial·USaka apple, apple computer
SafariOn-premDesktop App
Consumer Software / browser
iPadOSEmbeddedOS
Operating Systems / mobile-os
iOS and iPadOSEmbeddedOS
Operating Systems / mobile-os
macOSOn-premOS
Operating Systems / unix-bsd
tvOSEmbeddedOS
Operating Systems / mobile-os
watchOSEmbeddedOS
Operating Systems / mobile-os
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
debian
oss-project·GBaka debian gnu/linux
debian linuxOn-premOS
Operating Systems / linux-distro
webkitgtk
oss-projectaka webkit2gtk3, webkit2gtk, webkitgtk+
webkitgtkLibraryLibrary
OSS Libraries / generic-library
wpewebkit
oss-projectaka wpewebkit webkit
wpe webkitLibrary
Web & CMS Plugins / cms-core
and 9 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Mar 5, 2026
Remediation due:Mar 26, 2026

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Is your org exposed to CVE-2021-30952?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

http://www.openwall.com/lists/oss-security/2022/01/21/2
openwall.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/
lists.fedoraproject.org
and 13 more references View all →
News mentions
1

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-30952 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows