CVE-2020-9826 Denial of service in iOS
A remote attacker can cause a denial of service in Apple iOS and macOS due to insufficient input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-9826?
CVE-2020-9826 is a high-severity denial of service vulnerability in Apple Ipados, published on 9 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A denial of service issue was addressed with improved input validation. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5. A remote attacker may be able to cause a denial of service.
Weakness: CWE-20
Which versions are affected by CVE-2020-9826?
It affects 3 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X.
How do I fix CVE-2020-9826?
No fix has been published for CVE-2020-9826 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-9826 being exploited?
There is no known exploitation of CVE-2020-9826 in the wild and no public exploit code.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-448m-34cr-g6x8.