Photon OS 4.0 End of Life Date
Photon OS 4.0 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
Photon OS 4.0 was released on February 25, 2021 and support is scheduled to end on October 11, 2027 — a planned supported lifespan of 6 years and 8 months, in line with the 6 years and 8 months median for Photon OS releases.
What does Photon OS 4.0 end of life mean?
When Photon OS 4.0 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 Photon OS 4.0 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Photon OS 5.0 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.