Exploited vulnerability · CISA KEV

Is CVE-2020-9934 exploited? Yes: in CISA KEV since 8 Sep 2022

Gociux · Apple iOS, iPadOS, and macOS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-9934, Apple iOS, iPadOS, and macOS Input Validation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 8 Sep 2022, 692 days after it was published. It affects Apple iOS, iPadOS, and macOS. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 8 Sep 2022

ransomwareNot knownno confirmed use

EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)

severity5.5CVSS 3.1 · medium

US federal due29 Sep 2022BOD 22-01 deadline

What it is

Apple iOS, iPadOS, and macOS contain an unspecified vulnerability involving input validation which can allow a local attacker to view sensitive user information.

Vendor	Apple (96 exploited CVEs in KEV)
Product	iOS, iPadOS, and macOS
Vulnerability	Apple iOS, iPadOS, and macOS Input Validation Vulnerability
Weakness	not specified
Published	16 Oct 2020
Added to KEV	8 Sep 2022
Reported by (CNA)	apple

What to do

Check whether you run it. Look for iOS, iPadOS, and macOS in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apple CVE at once.
Apply the fix. Apply updates per vendor instructions.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 16 Oct 2020.
Get told next time. Email alerts when CISA adds a CVE for Apple.

Other exploited CVEs in iOS, iPadOS, and macOS

CVE-2025-43300: Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability (21 Aug 2025)
CVE-2023-41064: Apple iOS, iPadOS, and macOS ImageIO Buffer Overflow Vulnerability (11 Sep 2023)
CVE-2023-28206: Apple iOS, iPadOS, and macOS IOSurfaceAccelerator Out-of-Bounds Write Vulnerability (10 Apr 2023)
CVE-2021-30900: Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability (30 Mar 2023)
CVE-2022-32917: Apple iOS, iPadOS, and macOS Remote Code Execution Vulnerability (14 Sep 2022)
CVE-2022-22620: Apple iOS, iPadOS, and macOS Webkit Use-After-Free Vulnerability (11 Feb 2022)

References

Questions

Is CVE-2020-9934 being exploited?

Yes. CISA added CVE-2020-9934 to the Known Exploited Vulnerabilities catalog on 8 Sep 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-9934 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-9934?

Apply updates per vendor instructions. Check Apple's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected iOS, iPadOS, and macOS and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in September 2022 · Apple scorecard · act-now radar.

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