CVE-2021-30952An integer overflow was addressed with improved input validation.
Updated under an hour ago ()
Does this affect you?
It affects Apple watchOS and 10 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 5, 2026; federal agencies had to remediate by Mar 26, 2026. Treat that date as your deadline.
Do this next
Free account, 1 product
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.
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190
- Known exploited
- Added to CISA KEV Mar 5, 2026; federal remediation due Mar 26, 2026Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 6.96% (percentile 94)
- Assigned by
- apple
- NVD analysis
- Analyzed
- Record last updated
- Mar 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apple watchOS apple:watchos (from the name) | from unspecified before 8.3 | CNA record |
Apple iOS and iPadOS apple:ios_and_ipados (from the name) | from unspecified before 15.2 | CNA record |
Apple macOS apple:macos (from the name) | from unspecified before 12.1 | CNA record |
apple safari apple:safari | before 15.2 | NVD |
apple ipados apple:ipados | before 15.2 | NVD |
apple iphone_os apple:iphone_os | before 15.2 | NVD |
apple macos apple:macos | from 12.0 before 12.1 | NVD |
apple tvos apple:tvos | before 15.2 | NVD |
apple watchos apple:watchos | before 8.3 | NVD |
fedoraproject fedora fedoraproject:fedora | 34; 35 | NVD |
debian debian_linux debian:debian_linux | 10.0; 11.0 | NVD |
webkitgtk webkitgtk webkitgtk:webkitgtk | before 2.34.4 | NVD |
wpewebkit wpe_webkit wpewebkit:wpe_webkit | before 2.34.4 | NVD |
References
- https://support.apple.com/en-us/HT212975x-refsource-misc, release-notes, vendor-advisory
- https://support.apple.com/en-us/HT212976x-refsource-misc, release-notes, vendor-advisory
- https://support.apple.com/en-us/HT212978x-refsource-misc, release-notes, vendor-advisory
- https://support.apple.com/en-us/HT212980x-refsource-misc, release-notes, vendor-advisory
- https://support.apple.com/en-us/HT212982x-refsource-misc, release-notes, vendor-advisory
- http://www.openwall.com/lists/oss-security/2022/01/21/2mailing-list, x-refsource-mlist, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EQVZ3CEMTINLBZ7PBC7WRXVEVCRHNSM/vendor-advisory, x-refsource-fedora, broken-link
- https://www.debian.org/security/2022/dsa-5061vendor-advisory, x-refsource-debian, mailing-list, third-party-advisory
- https://www.debian.org/security/2022/dsa-5060vendor-advisory, x-refsource-debian, mailing-list, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQKWD4BXRDD2YGR5AVU7H5J5PIQIEU6V/vendor-advisory, x-refsource-fedora, broken-link
- https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kitexploit, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30952us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.