CVE-2021-30952
Confirmed PUBLISHEDAn 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...
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Aug 24, 2021
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 7.8 High
- EPSS
- 7.6%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Apple |
watchOS
|
unspecified to < 8.3 |
Affected |
| Apple |
iOS and iPadOS
|
unspecified to < 15.2 |
Affected |
| Apple |
macOS
|
unspecified to < 12.1 |
Affected |
| Apple |
macOS
|
unspecified to < 15.2 |
Affected |
| Apple |
macOS
|
unspecified to < 15.2 |
Affected |
CVE References
- FEDORA-2022-25a98f5d55 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- DSA-5061 debian.org · Vendor Advisory https://www.debian.org/security/2022/dsa-5061
- DSA-5060 debian.org · Vendor Advisory https://www.debian.org/security/2022/dsa-5060
- FEDORA-2022-f7366e60cb lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- [oss-security] 20220121 WebKitGTK and WPE WebKit Security Advisory WSA-2022-0001 openwall.com · Mailing List http://www.openwall.com/lists/oss-security/2022/01/21/2
Show 5 more references
- support.apple.com/en-us/HT212975 support.apple.com · CVE Record https://support.apple.com/en-us/HT212975
- support.apple.com/en-us/HT212976 support.apple.com · CVE Record https://support.apple.com/en-us/HT212976
- support.apple.com/en-us/HT212978 support.apple.com · CVE Record https://support.apple.com/en-us/HT212978
- support.apple.com/en-us/HT212980 support.apple.com · CVE Record https://support.apple.com/en-us/HT212980
- support.apple.com/en-us/HT212982 support.apple.com · CVE Record https://support.apple.com/en-us/HT212982
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 11:38 UTC |
| CISA | 2026-06-02 14:03 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:P
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 11:38:00 UTC · CVE
Weaknesses (CWE)
-
Integer Overflow or Wraparound
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:03 UTC about 2 months ago14:03 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
11:38 UTC about 2 months ago11:38 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
18:50 UTC almost 5 years ago18:50 UTC · almost 5 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC over 5 years ago00:00 UTC · over 5 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2021-30952
{
"cve_id": "CVE-2021-30952",
"title": "An integer overflow was addressed with improved input validation. This issue ...",
"affected_vendor": "Apple",
"affected_product": "watchOS, iOS and iPadOS, macOS",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 7.8,
"epss_score": 0.07617,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}