The default configuration of the server in MobaXterm before 8.3 has a disabled Access Control setting and consequently does not require authentication for X11 connections, which allows remote attackers to execute arbitrary commands or obtain sensitive information via X11 packets.
Conclusion & alert: CVE-2015-7244 is rated Moderate Risk (62.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.43%). Core evidence: EPSS rose +1.12% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-28 | 3.31% | 4.43% | +1.12% |
| 2 | 2026-03-03 | 5.93% | 3.31% | -2.62% |
| 3 | 2026-02-10 | — | 5.93% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| URL | Tags |
|---|---|
| http://blog.mobatek.net/post/mobaxterm-new-release-8.3/ | Patch Vendor Advisory |
| http://www.kb.cert.org/vuls/id/316888 | Third Party Advisory US Government Resource |
| http://www.securifera.com/advisories/cve-2015-7244 |