CVE-2021-30786
A race condition was addressed with improved state handling.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.79%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A race condition was addressed with improved state handling. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. Opening a maliciously crafted PDF file may lead to an unexpected application termination or arbitrary code execution.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.79% probability · 56th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- apple/iphone os · apple/macos
- Source
- product-security@apple.com
EPSS 0.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://support.apple.com/en-us/HT212601Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212602Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212601Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212602Release Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.