CVE-2026-24423

9.3 CRITICAL 88% exploit odds Drop everything exploited in the wild No fix listed Auth & access Server

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2026-01-22 18:21 UTC ReservedThe CVE id was reserved by its CNA
2026-01-23 17:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-02-05 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2026-02-26 Remediation deadlineCISA's due date for federal agencies to fix it
2026-08-04 05:16 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 88.2% in the next 30 days (EPSS).
Severity: 9.3 CRITICAL (CVSS).
Fix: none linked yet, which raises it.
It meets the bar for Drop everything: critical, and exploited or very likely to be.

Details

Published: 2026-01-23 17:16 UTC
Last modified: 2026-08-04 05:16 UTC
Added to CISA KEV: 2026-02-05
Exploit probability: 88.2% · EPSS, next 30 days
Weakness: CWE-306 · Missing authentication
Record status: Analyzed

Affected

Smartertools Smartermail < 100.0.9511

Attack profile CVSS 4.0 · 9.3

Attack vector: Network
Complexity: Low
Attack requirements: None
Privileges needed: None
User interaction: None
Confidentiality: High
Integrity: High
Availability: High

Raw 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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-24423.md and follow it. Check whether this project is affected by CVE-2026-24423. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record