SmarterTools SmarterMail up to 100.0.9510 Password Reset API authentication bypass

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in SmarterTools SmarterMail up to 100.0.9510. This affects an unknown function of the component Password Reset API. Executing a manipulation can lead to authentication bypass. This vulnerability appears as CVE-2026-23760. The attack may be performed from remote. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in SmarterTools SmarterMail up to 100.0.9510 and classified as critical. This vulnerability affects an unknown function of the component Password Reset API. The manipulation with an unknown input leads to a authentication bypass vulnerability. The CWE definition for the vulnerability is CWE-288. A product requires authentication, but the product has an alternate path or channel that does not require authentication. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was presented by Piotr Bazydlo and Sina Kheirkhah. The advisory is shared for download at smartertools.com. This vulnerability was named CVE-2026-23760 since 01/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but an exploit is available.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 297224 (SmarterMail < 100.0.9511 Auth Bypass (CVE-2026-23760)), which helps to determine the existence of the flaw in a target environment. This issue was added on 01/26/2026 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 02/16/2026:

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

Upgrading to version 100.0.9511 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (297224), EUVD (EUVD-2026-4143) and CERT Bund (WID-SEC-2026-0133). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • SmarterTools SmarterMail

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authentication bypass
CWE: CWE-288 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 297224
Nessus Name: SmarterMail < 100.0.9511 Auth Bypass (CVE-2026-23760)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: SmarterMail 100.0.9511

Timelineinfo

01/15/2026 CVE reserved
01/22/2026 +7 days Advisory disclosed
01/22/2026 +0 days VulDB entry created
02/26/2026 +35 days VulDB entry last update

Sourcesinfo

Advisory: smartertools.com
Researcher: Piotr Bazydlo, Sina Kheirkhah
Status: Confirmed

CVE: CVE-2026-23760 (🔒)
GCVE (CVE): GCVE-0-2026-23760
GCVE (VulDB): GCVE-100-342328
EUVD: 🔒
CERT Bund: WID-SEC-2026-0133 - SmarterTools SmarterMail: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/22/2026 16:19
Updated: 02/26/2026 20:47
Changes: 01/22/2026 16:19 (68), 01/23/2026 09:01 (6), 01/24/2026 15:20 (1), 01/27/2026 00:01 (13), 01/27/2026 14:53 (1), 01/28/2026 02:27 (11), 01/31/2026 03:52 (2), 02/26/2026 20:47 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

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