CVE-2026-23760SmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Reset API

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.

9.3 CRITICALEPSS 96.43%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-08-04 05:16 UTC

OverviewCVSS details

9.3CRITICALCVSS 4.0

Score source: VulnCheck (CNA)
NVD status: Analyzed
Published: Jan 22, 2026
Assigner: VulnCheck

Affected

SmarterMail (SmarterTools)

Versions: before 100.0.9511
Fixed in: 100.0.9511

Exploitation

Public exploit: Yes · 2 references
CISA KEV: Listed · Jan 26, 2026
KEV due date: Feb 16, 2026
Ransomware use: Known
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 8

96.43%chance of exploitation in 30 days

Higher than 99.88% of CVEs

CVSS 4.0 · VulnCheck (CNA)

9.3Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: None
User interaction: None
Confidentiality impact: High
Integrity impact: High
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): None

CVSS 3.1 · NVD

9.8Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.3	CRITICAL	4.0VulnCheck (CNA)	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA required action

⚡ Known exploited · remediation due Feb 16, 2026

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Details

CVE ID: CVE-2026-23760
Status: Analyzed
Assigner (CNA): VulnCheck
Published: Jan 22, 2026
Last modified: 2026-08-04 05:16 UTC
Weaknesses: CWE-288 · Authentication Bypass Using an Alternate Path or Channel

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-09 10:15 UTC.