Coverage › CVE-2026-24423
CVE-2026-24423 Unmapped
SmarterTools SmarterMail Missing Authentication for Critical Function Vulnerability
- Vendor / product
- SmarterTools — SmarterMail
- Description (CISA)
- SmarterTools SmarterMail contains a missing authentication for critical function vulnerability in the ConnectToHub API method. This could allow the attacker to point the SmarterMail instance to a malicious HTTP server which serves the malicious OS command and could lead to command execution.
- Added to KEV
- 2026-02-05 — after the latest CTID mapping snapshot (2025-07-28)
- Due date
- 2026-02-26
- 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.
- Known ransomware use
- Known
- CWE
- CWE-306
- CISA 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 - Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2026-24423. This entry was added to KEV on 2026-02-05, after that snapshot; of the 283 entries added since, 0 have a mapping. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-306) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.