What is CVE-2020-9907?

CVE-2020-9907 is a high-severity vulnerability in Apple iOS, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-10-16.

How severe is CVE-2020-9907?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-9907 known to be exploited?

Yes. CVE-2020-9907 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-27), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Buffer overflow in Apple iOS

CVE-2020-9907

A memory corruption issue was addressed by removing the vulnerable code. This issue is fixed in iOS 13.6 and iPadOS 13.6, tvOS 13.4.8. An application may be able to execute arbitrary code with kernel privileges.

Vulnerability class: Buffer Overflow

Published 2020-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.032 (87.9th percentile), scored 2026-10-18.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.039 · newest: 0.032 · change: -0.007

Affected products

Apple iOS — versions unspecified
Apple Ipados
Apple Iphone OS
Apple tvOS — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-06-27. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-07-18.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

support.apple.com/HT211288 (Release Notes, Vendor Advisory)
support.apple.com/HT211290 (Release Notes, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2020-9907?: CVE-2020-9907 is a high-severity vulnerability in Apple iOS, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-10-16.
How severe is CVE-2020-9907?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-9907 known to be exploited?: Yes. CVE-2020-9907 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-27), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.