Cisco IOS 15.9(3)M · Version Status
Cisco IOS 15.9(3)M End of Life Date
Cisco IOS 15.9(3)M end-of-life date, support status, and CVE risk. Dates read at the vendor's own lifecycle pages (cisco.com); the source of each date is on the product page.
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Cisco IOS 15.9(3)M is actively supported. EOL date: July 27, 2029.
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EOL Date
Jul 27, 2029
1020 days remaining
Latest Release
15.9
Standard release
Release Date
—
Cisco IOS 15.9(3)M series
Extended Support
Jul 31, 2031
Extended support
Attack Surface
10/30 Medium tier
CISA KEV Exposure
20/20 Named in CISA KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
What does Cisco IOS 15.9(3)M end of life mean?
When Cisco IOS 15.9(3)M 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: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Cisco IOS 15.9(3)M past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Cisco IOS 15.9(3)M or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Cisco IOS 15.9(3)M reach end of life?
Cisco IOS 15.9(3)M reaches end of life on July 27, 2029. That is 1020 days remaining.
Is Cisco IOS 15.9(3)M still supported?
Yes, Cisco IOS 15.9(3)M is currently supported. The EOL date is July 27, 2029.
What should I upgrade to from Cisco IOS 15.9(3)M?
The recommended upgrade from Cisco IOS 15.9(3)M is
Cisco IOS 15.9(3)M — the latest actively supported version. Check the
Cisco IOS full timeline for all supported versions.
What are the security risks of running Cisco IOS 15.9(3)M past EOL?
When Cisco IOS 15.9(3)M reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Cisco IOS should migrate immediately or implement compensating controls.