SmarterTools SmarterMail: SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
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- started
- Feb 5, 2026
- closed
- Feb 5, 2026
- CVEs
- 1
- sources
- 3
## summary
SmarterTools SmarterMail contains a missing authentication for critical function vulnerability in the ConnectToHub API method. This could allow the attacker to point the SmarterMail instance to a malicious HTTP server which serves the malicious OS command and could lead to command execution. Added to CISA KEV on 2026-02-05.
severity: Actively exploited (CISA KEV); known ransomware use
## cve ids[1]
## affected
- See vendor advisory / CISA notes (versions not always listed in KEV feed)
## fixed in
- See vendor advisory linked in sources
## timeline[1]
CISA added CVE-2026-24423 to the KEV catalog (due 2026-02-26).
## advisories[2]
## news & write-ups[1]
## notes & caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).
