CVE-2026-24423

CVE Enrichment

CVSS: 9.3 CRITICAL
EPSS: 88.18%
EPSS Percentile: 99.77%
CISA KEV: YES — Known Exploited Vulnerability

Description

SmarterTools SmarterMail versions prior to build 9511 contain an unauthenticated remote code execution vulnerability in the ConnectToHub API method. The attacker could point the SmarterMail to the malicious HTTP server, which serves the malicious OS command. This command will be executed by the vulnerable application.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 24-Jan-2026 00:16
Last Modified: 04-Aug-2026 12:16
EPSS Date: 2026-11-08
CWE: CWE-306

CVSS Vector


            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

CISA KEV Details

Date Added: 2026-02-05
Remediation Due: 2026-02-26
Known Ransomware Campaign Use: Known
Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes: https://www.smartertools.com/smartermail/release-notes/current ; https://www.cve.org/CVERecord?id=CVE-2026-24423 ; https://nvd.nist.gov/vuln/detail/CVE-2026-24423

CNA Products / Version Status

SmarterTools · SmarterMail Source: CNA · [email protected]
Default status: unaffected

0 ≤ version < 100.0.9511 — affected (semver)

Affected Products / Versions

smartertools / smartermail Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 100.0.9511
cpe:2.3:a:smartertools:smartermail:*:*:*:*:*:*:*:*

References

Last enrichment sync: 09-Nov-2026 11:13
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (2)

Exploitation of software vulnerabilities and slow patch adoption drives many high-impact intrusions, including CVE-2026-22719 and CVE-2026-24423. Cyber Warfare in 2026: Nation-State Activity, AI-Enabled Threats, and Vulnerability Exploitation
being disclosed, with threat actors sharing and selling exploit code and compromised access tied to CVE-2026-24423 and CVE-2026-23760, critical flaws that enable remote code execution and authentication bypass on Flare Reports Rapid Exploit Sharing for SmarterMail Flaws

CVE (5)

Threat Actors (6)

MITRE ATT&CK (6)

Vendors (3)

Products (8)

Industries (4)

Countries (7)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.