How severe is CVE-2026-23760?

CVE-2026-23760 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-23760 being actively exploited?

Yes. CVE-2026-23760 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-01-26, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-23760?

CVE-2026-23760 affects Smartertools Smartermail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23760?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-23760 have an EU (EUVD) identifier?

Yes. CVE-2026-23760 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4143. It is also flagged as exploited in the EUVD (since 2026-01-26).

When was CVE-2026-23760 published?

CVE-2026-23760 was published on 2026-01-22 and last updated on 2026-08-04.

CVE-2026-23760

CVE-2026-23760 is a critical-severity vulnerability in Smartertools Smartermail with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-01-26). The underlying weakness is classified as CWE-288.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 96% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-01-26)
EU (EUVD) id: EUVD-2026-4143
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-01-26)
Weakness: CWE-288
Affected product: Smartertools Smartermail
Published: 2026-01-22
Last modified: 2026-08-04

Description

SmarterTools SmarterMail versions prior to build 9511 contain an authentication bypass 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. An unauthenticated attacker can supply a target administrator username and a new password to reset the account, resulting in full administrative compromise of the SmarterMail instance. NOTE: SmarterMail system administrator privileges grant the ability to execute operating system commands via built-in management functionality, effectively providing administrative (SYSTEM or root) access on the underlying host.

Frequently asked questions

What is CVE-2026-23760?: SmarterTools SmarterMail versions prior to build 9511 contain an authentication bypass 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. An unauthenticated attacker can supply a target administrator username and a new password to reset the account, resulting in full administrative compromise of the SmarterMail instance. NOTE: SmarterMail system administrator privileges grant the ability to execute operating system commands via built-in management functionality, effectively providing administrative (SYSTEM or root) access on the underlying host.
How severe is CVE-2026-23760?: CVE-2026-23760 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-23760 being actively exploited?: Yes. CVE-2026-23760 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-01-26, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-23760?: CVE-2026-23760 affects Smartertools Smartermail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23760?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-23760 have an EU (EUVD) identifier?: Yes. CVE-2026-23760 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4143. It is also flagged as exploited in the EUVD (since 2026-01-26).
When was CVE-2026-23760 published?: CVE-2026-23760 was published on 2026-01-22 and last updated on 2026-08-04.

References

Affected products (1)

cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:*

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