Vulnerability · Published Sep 8, 2021 · Assigned by apple

CVE-2021-1878

Medium 6.5

In plain English

A medium-severity security flaw in macOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities).

Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.8%top 21.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. An attacker in a privileged network position may be able to leak sensitive user information.

Affected products (as reported)

VendorProductVersions
Apple macOS unspecified – before 11.3
Apple macOS unspecified – before 2021
Apple macOS unspecified – before 2021

References