CVE-2021-1782
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National Vulnerability Database Information
Description: A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..
CVSS Base Score: 7.0 (v3.1)
The **CVSS Base Score** is a score from **0 to 10** that represents the intrinsic severity of a vulnerability. A higher score indicates greater severity.
0.02.55.07.510.0
Published on: 04/02/2021 18:15:21
Last modified: 10/23/2025 18:01:51
NIST: CVE source from the National Vulnerability Database (NVD)
CVSS Metrics Details
- Base Severity: HIGH
- Vector String: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack Vector: LOCAL
- Attack Complexity: HIGH
- Privileges Required: LOW
- User Interaction: NONE
- Scope: UNCHANGED
- Confidentiality Impact: HIGH
- Integrity Impact: HIGH
- Availability Impact: HIGH
Common Weakness Enumeration (CWE)
Database CWE: v4.18
CWE-667: Improper Locking ↗
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
Fonte: MITRE CWE
FIRST Information
EPSS Score: 0.0790
The **EPSS (Exploit Prediction Scoring System)** is a score from **0 to 1** that indicates the **probability** that a vulnerability will be exploited in the real world in the next 30 days. A higher value indicates a greater likelihood of exploitation.
0.00.250.50.751.0
Percentile: 0.9181
The **Percentile** indicates how much higher this vulnerability's EPSS score is compared to all other vulnerabilities in the EPSS database. For example, a percentile of 0.90 (90%) means that 90% of vulnerabilities have an EPSS score equal to or lower than the current one.
0.00.250.50.751.0
*Data updated as of: 2026-01-29
CISA Information (Known Exploited Vulnerabilities)
The **CISA KEV Catalog** lists vulnerabilities that have been **actively exploited in the real world**. If a CVE is present in this catalog, it indicates that the threat is immediate and mitigation should be a top priority.
CVE **CVE-2021-1782** **IS PRESENT** in the CISA KEV Catalog!
- Vulnerability Name: Apple Multiple Products Race Condition Vulnerability
- Short Description: Apple iOS, iPadOs, macOS, watchOS, and tvOS contain a race condition vulnerability that may allow a malicious application to elevate privileges.
- Date Added to KEV: 11/03/2021
- Vendor/Product: Apple / Multiple Products
- Required Action: Apply updates per vendor instructions.
- Due Date: 11/17/2021
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