Background exploitation KEV catalog No authentication

CVE-2022-22587

Apple Memory Corruption Vulnerability

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 15.3 and iPadOS 15.3, macOS Big Sur 11.6.3, macOS Monterey 12.2. A malicious application may be able to execute arbitrary code with kernel…

CheckOps priority index

6.7/10 Patch within 7 days

Severity9.8

Probability1.2

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 11.6% higher than 96.1% of CVEs

CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,740 days 28 Jan 2022

CISA due date 11 Feb 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)28 Jan 2022
Exploited in EUVD (ENISA)28 Jan 2022
Used by ransomwareno
EPSS above 10 %11.6%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

Affected products

macOSiOS and iPadOSiOS and macOS

Affected versions

unspecified <12.2
unspecified <11.6
unspecified <15.3

Weaknesses (CWE)

CWE-20 CWE-787

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

28 Jan 2022
Exploitation reported (ENISA)
28 Jan 2022
Added to the KEV catalog
11 Feb 2022
CISA remediation due date
18 Mar 2022
Published
26 Sept 2026
EPSS peak: 11.6%

References

Other exploited vulnerabilities from the same vendor

CVE-2026-86950Apple Multiple Products Out-of-Bounds Write Vulnerability
6.7 · Actively exploited
CVE-2026-65400Apple macOS Improper Authentication Vulnerability
5.8 · Actively exploited
CVE-2025-43520Apple Multiple Products Classic Buffer Overflow Vulnerability
3.4 · Background exploitation
CVE-2025-43510Apple Multiple Products Improper Locking Vulnerability
4.3 · Background exploitation
CVE-2025-31277Apple Multiple Products Buffer Overflow Vulnerability
5.4 · Background exploitation
CVE-2023-43000Apple Multiple products Use-After-Free Vulnerability
5.4 · Background exploitation