Vendor History

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SmarterTools (SmarterMail) security incident history

Updated . Data gathered daily from official public sources.

As of Oct 26, 2026, Vendor History found 3 actively exploited security flaws for SmarterTools (SmarterMail), dated Jan 26, 2026 to Feb 5, 2026. Sources checked: the California and Washington Attorney General breach lists and CISA's Known Exploited Vulnerabilities catalog.

Breach notices and SEC cyber filings

None found in the sources we check.

Got a breach letter from SmarterTools (SmarterMail)? What to do when a vendor has a data breach.

Actively exploited security flaws

Flaws in SmarterTools (SmarterMail) products that CISA lists as exploited by attackers. If you use an affected product, check that it's updated. What a listing means.

  1. Exploited flaw

    SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability (CVE-2026-24423). Added to CISA's list of security flaws known to be exploited by attackers. CISA lists it as used in ransomware campaigns.

    Source: CISA Known Exploited Vulnerabilities catalog

  2. Exploited flaw

    SmarterTools SmarterMail Unrestricted Upload of File with Dangerous Type Vulnerability (CVE-2025-52691). Added to CISA's list of security flaws known to be exploited by attackers. CISA lists it as used in ransomware campaigns.

    Source: CISA Known Exploited Vulnerabilities catalog

  3. Exploited flaw

    SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability (CVE-2026-23760). Added to CISA's list of security flaws known to be exploited by attackers. CISA lists it as used in ransomware campaigns.

    Source: CISA Known Exploited Vulnerabilities catalog

We check: California and Washington Attorney General breach notices, SEC cyber incident filings (Form 8-K, Item 1.05) and CISA's catalog of actively exploited security flaws. An empty section means we found nothing in those sources. It does not mean nothing happened. How it works

To cite: Vendor History, "SmarterTools (SmarterMail) security incident history," vendorhistory.com/vendor/smartertools, data checked Oct 26, 2026. Free to reuse under CC BY 4.0 with credit to Vendor History.