Exploited vulnerabilities / CVE-2026-23760
Confirmed exploited · authentication bypass · SmarterTools SmarterMailCVE-2026-23760
SmarterTools SmarterMail authentication bypass, confirmed exploited in the wild.
SmarterTools SmarterMail contains an authentication bypass using an alternate path or channel vulnerability in the password reset API. The force-reset-password endpoint permits anonymous requests and fails to verify the existing password or a reset token when resetting system administrator accounts. This could allow an unauthenticated attacker to supply a target administrator username and a new password to reset the account, resulting in full administrative compromise of the SmarterMail instance.
| CISA's name for it | SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability |
|---|---|
| Vendor and product | SmarterTools · SmarterMail |
| Type | authentication bypass · CWE-288 |
| Exploited | Confirmed by CISA listed 26 January 2026 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 16 February 2026 · already passed |
| Used in ransomware | Yes: CISA reports it used in ransomware campaigns |
| Advisories | www.smartertools.com ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Apply the vendor fix and restart the affected service.
Put the login or management interface behind a VPN or allow-list; a bypass makes passwords irrelevant.
Rotate credentials and session keys the product holds, and review accounts and configuration changes since the listing date.
| CISA's required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
|---|
Know before someone else finds it
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CVE-2026-23760 in short
Is CVE-2026-23760 being exploited?
Yes. CISA added CVE-2026-23760 to its Known Exploited Vulnerabilities catalogue on 26 January 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-23760?
US federal agencies must remediate it by 16 February 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-23760 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 96%, the 99th percentile of every CVE it scores.
How do I fix CVE-2026-23760?
Apply the vendor fix and restart the affected service. Put the login or management interface behind a VPN or allow-list; a bypass makes passwords irrelevant. Rotate credentials and session keys the product holds, and review accounts and configuration changes since the listing date.
Other SmarterTools vulnerabilities being exploited
| CVE | Product | Type | Listed |
|---|---|---|---|
| CVE-2026-24423 | SmarterMail | command injection | 5 February 2026 |
| CVE-2025-52691 | SmarterMail | remote code execution | 26 January 2026 |
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.