Apple iOS, iPadOS, and macOS Input Validation Vulnerability

An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A local user may be able to view sensitive user…

CheckOps priority index

3.5/10 Patch within 7 days

Severity5.5

Probability0.3

Exploitation2/5

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

EPSS · today 3.2% higher than 88.2% of CVEs

CVSS 3.1 5.5 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:

Exploited for 1,517 days 08 Sept 2022

CISA due date 29 Sept 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 2 / 5

KEV catalog (CISA)08 Sept 2022
Exploited in EUVD (ENISA)08 Sept 2022
Used by ransomwareno
EPSS above 10 %3.2%
No account, over the networkno

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

IOSmacOSiOS, iPadOS, and macOS

Affected versions

unspecified <iOS 13.6 and iPadOS 13.6
unspecified <macOS Catalina 10.15.6

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

16 Oct 2020
Published
08 Sept 2022
Exploitation reported (ENISA)
08 Sept 2022
Added to the KEV catalog
29 Sept 2022
CISA remediation due date

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