CVE-2026-55366 Auth bypass in Android
Attackers can bypass authentication in the IP Multimedia Subsystem to achieve remote privilege escalation without user interaction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55366?
CVE-2026-55366 is a critical authentication bypass vulnerability in Google Android, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In IP Multimedia Subsystem, there is a possible authentication bypass due to a logic error in the code. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
Weakness: CWE-693
Which versions are affected by CVE-2026-55366?
It affects 1 product.
Products include Google Android.
How do I fix CVE-2026-55366?
Apply the vendor's patch.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-55366 being exploited?
There is no known exploitation of CVE-2026-55366 in the wild and no public exploit code.
Other vulnerabilities in Google Android
Sources
Also known as A-454322925, GHSA-pg74-8969-ff7x, PUB-A-454322925.