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Samsung Releases One UI 9 with Vulnerabilities in October Security Update

Samsung Releases One UI 9 with Vulnerabilities in October Security Update

First seen 25 Oct 2026, 18:41 UTC • •
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ThreatCluster AI
ThreatCluster •October 25, 2026 at 20:44 UTC
  • •Samsung's October update includes One UI 9 for 28 devices.
  • •Nine vulnerabilities are rated critically dangerous, including CVE-2026-20519 and CVE-2026-20520.
  • •The update addresses serious memory errors and a use-after-free vulnerability in the WSM service.

Samsung has rolled out One UI 9 for 28 devices, including Galaxy A and M series phones, as part of its October 2026 security update. This update addresses 83 vulnerabilities, with nine rated as critically dangerous, including CVE-2026-20519 and CVE-2026-20520, both published on October 5, 2026. The vulnerabilities include serious memory errors and a use-after-free vulnerability in the WSM service, which could allow local attackers to execute code with system privileges. Samsung has also released beta updates for several Galaxy Watch models. Users of the Galaxy S23 series are receiving their last major update unless further updates are provided. The update is crucial for maintaining device security as it addresses high-severity vulnerabilities that could be exploited if not patched.

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Timeline

2026-10-05
CVE-2026-20519 published
A high-severity vulnerability affecting Samsung devices was disclosed, allowing potential code execution.
Samsungmagazine.Eu
2026-10-05
CVE-2026-20520 published
Another high-severity vulnerability was disclosed, posing risks to Samsung device security.
Samsungmagazine.Eu
2026-10-25
One UI 9 rollout begins
Samsung started releasing One UI 9 for multiple Galaxy devices, including budget models.
Sammyguru

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Common questions

Which devices received the One UI 9 update?
Samsung has rolled out One UI 9 for 28 devices, including Galaxy A and M series phones.
What vulnerabilities are included in the October update?
The update addresses 83 vulnerabilities, with nine rated critically dangerous, including CVE-2026-20519 and CVE-2026-20520.
How urgent is it to apply the October security update?
It is critical to apply the update to mitigate risks from high-severity vulnerabilities that could be exploited.