Cisco Secure Email Gateway 15.0 (FIPS compliant) · Version Status
Cisco Secure Email Gateway 15.0 (FIPS compliant) End of Life Date
Cisco Secure Email Gateway 15.0 (FIPS compliant) end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
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Cisco Secure Email Gateway 15.0 (FIPS compliant) is actively supported. EOL date: April 30, 2027.
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EOL Date
Apr 30, 2027
227 days remaining
Latest Release
15.0
Standard release
Release Date
Aug 10, 2023
Cisco Secure Email Gateway 15.0 (FIPS compliant) series
Lifecycle detail
Cisco Secure Email Gateway 15.0 was released on August 10, 2023 and support is scheduled to end on April 30, 2027 — a planned supported lifespan of 3 years and 9 months, longer than the 3 years and 1 month median for Cisco Secure Email Gateway releases.
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 →
All Cisco Secure Email Gateway Versions
What does Cisco Secure Email Gateway 15.0 (FIPS compliant) end of life mean?
When Cisco Secure Email Gateway 15.0 (FIPS compliant) 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 Cisco Secure Email Gateway 15.0 (FIPS compliant) past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Cisco Secure Email Gateway 16.5 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Cisco Secure Email Gateway 15.0 (FIPS compliant) reach end of life?
Cisco Secure Email Gateway 15.0 (FIPS compliant) reached end of life on April 30, 2027. That is 227 days remaining.
Is Cisco Secure Email Gateway 15.0 (FIPS compliant) still supported?
Yes, Cisco Secure Email Gateway 15.0 (FIPS compliant) is currently supported. The EOL date is April 30, 2027.
What should I upgrade to from Cisco Secure Email Gateway 15.0 (FIPS compliant)?
The recommended upgrade from Cisco Secure Email Gateway 15.0 (FIPS compliant) is
Cisco Secure Email Gateway 16.5 — the latest actively supported version. Check the
Cisco Secure Email Gateway full timeline for all supported versions.
What are the security risks of running Cisco Secure Email Gateway 15.0 (FIPS compliant) past EOL?
When Cisco Secure Email Gateway 15.0 (FIPS compliant) reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Cisco Secure Email Gateway should migrate immediately or implement compensating controls.