Type Vulnerability
CVE-2026-23760 has an estimated attack likelihood score of 0.965 (~96.5% estimated chance of exploitation in the next 30 days; 99.9th percentile) as of 2026-09-24.
SmarterTools · Auth bypass
SmarterTools SmarterMail Authentication Bypass Using an Alternate Path or Channel Vulnerability
CVE-2026-23760
What this means
This is rated critical severity (9.3 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Smartertools Smartermail is in your estate, and treat that as the priority.
Full vendor 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.
Scoring and exploitation
9.3/ 10
CVSS 4.0 base scoreCritical
Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability.
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Exploitability
Longer bar: easier to attack
Attack vectorNetworkAV:N
Attack complexityLowAC:L
Attack requirementsNoneAT:N
Privileges requiredNonePR:N
User interactionNoneUI:N
Impact
Longer bar: more harm
ConfidentialityHighVC:H
IntegrityHighVI:H
AvailabilityHighVA:H
- Elevated attack likelihood (~96.4% in 30 days)Model estimate (): a probability signal, not confirmed exploitation
- Exploited in the wild
- Yes — confirmed exploitation (US CISA )
- Known
- Listed product
- SmarterTools SmarterMail
Weaknesses
CWE-288
Affected products ()
- Smartertools Smartermail
Show the raw CPE strings (1)
- cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:*
References
6 links from the CVE record, grouped by site.
code-white.com1 link
- public-vulnerability-list (opens in a new tab)Third Party Advisory
labs.watchtowr.com1 link
- attackers-with-decompilers-strike-again-smartertools-smartermail-wt-2026-0001-auth-bypass (opens in a new tab)Exploit · Third Party Advisory
smartertools.com1 link
- current (opens in a new tab)Release Notes
vulncheck.com1 link
cisa.gov1 link
- known-exploited-vulnerabilities-catalog (opens in a new tab)US Government Resource
huntress.com1 link
- smartermail-account-takeover-leading-to-rce (opens in a new tab)Exploit · Third Party Advisory