iOS 11 End of Life Date
iOS 11 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
iOS 11 was released on September 19, 2017 and support ended on October 8, 2018 — a supported lifespan of 1 year and 1 month, in line with the 1 year and 1 month median for iOS releases. The last patch it will ever receive is 11.4.1, published July 9, 2018 — 3 months before support ended. It has been without security patches for 7 years and 10 months. 7 newer iOS releases have shipped since.
What does iOS 11 end of life mean?
When iOS 11 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running iOS 11 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to iOS 26 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.