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CVE-2021-1844
A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v.…
High8.8EPSS 2.4%
- Published
- Updated
- Reserved
- Assigned by
- apple
Description
A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v. 14610.4.3.1.7 and 15610.4.3.1.7), watchOS 7.3.2, macOS Big Sur 11.2.3. Processing maliciously crafted web content may lead to arbitrary code execution.
Timeline
ID reserved
By apple
- 4 months later
· 4 months later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.4% · top 16% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
- Processing maliciously crafted web content may lead to arbitrary code execution
- CWE-787 (opens in a new tab)All about CWE-787 and its CVEs
Affected products
References (8)
- https://support.apple.com/en-us/HT212220 (opens in a new tab)x_refsource_MISCx_transferred
- https://support.apple.com/en-us/HT212221 (opens in a new tab)x_refsource_MISCx_transferred
- https://support.apple.com/en-us/HT212222 (opens in a new tab)x_refsource_MISCx_transferred
- https://support.apple.com/en-us/HT212223 (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2021-864dc37032 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://support.apple.com/kb/HT212323 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20210427 APPLE-SA-2021-04-26-6 tvOS 14.5 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- DSA-4923 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-1844)Record last updated .