CVE-2026-23760
Confirmed PUBLISHEDSmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Reset API
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Jan 22, 2026
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 9.3 Critical
- EPSS
- 96.3%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| SmarterTools |
SmarterMail
|
0 to < 100.0.9511 |
Affected |
CVE References
- Patch — smartertools.com smartertools.com · Patch https://www.smartertools.com/smartermail/release-notes/current
- Third-Party Advisory — code-white.com code-white.com · Third-Party Advisory https://code-white.com/public-vulnerability-list/#authenticationservi...
- Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://www.vulncheck.com/advisories/smartertools-smartermail-authent...
- Exploit — labs.watchtowr.com labs.watchtowr.com · Exploit https://labs.watchtowr.com/attackers-with-decompilers-strike-again-sm...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:49 UTC |
| CISA | 2026-06-02 14:03 UTC |
| The Shadowserver | 2026-07-13 00:00 UTC |
Scanner Artifacts
Nuclei and Metasploit references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-23760.yaml | Jun 01, 2026 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:49:49 UTC · CVE
Used in malware
Recorded 2026-06-02 14:03:57 UTC · CVE
Proof of concept available
Recorded 2026-01-24 12:30:34 UTC · GitHub
Weaknesses (CWE)
-
Authentication Bypass Using an Alternate Path or Channel
Scanner Integrations
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-23760.yaml | Jun 01, 2026 |
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2026-01-24 12:30:34 UTC · 3 stars
CVE-2026-23760 - An authentication bypass via password reset API in SmarterMail.
nuclei · Created Unknown
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
00:00 UTC 5 days ago00:00 UTC · 5 days ago
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
14:03 UTC about 2 months ago14:03 UTC · about 2 months ago
First public exploitation report
Exploit observed in malware
-
14:03 UTC about 2 months ago14:03 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
15:34 UTC about 2 months ago15:34 UTC · about 2 months ago
Nuclei template available
Scanner coverage available
-
10:49 UTC about 2 months ago10:49 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
12:30 UTC 6 months ago12:30 UTC · 6 months ago
Public PoC available
Public proof-of-concept code published
-
14:35 UTC 6 months ago14:35 UTC · 6 months ago
CVE published
Vulnerability disclosed publicly
-
18:42 UTC 6 months ago18:42 UTC · 6 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-23760
{
"cve_id": "CVE-2026-23760",
"title": "SmarterTools SmarterMail < Build 9511 Authentication Bypass via Password Rese...",
"affected_vendor": "SmarterTools",
"affected_product": "SmarterMail",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 9.3,
"epss_score": 0.96268,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}