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CVE-2026-73226— Electerm WebSocket `upgrade-func` and `fs` handlers allow arbitrary method/function invocation due to missing method-name allowlist

Quick assessment

Affected
electerm electerm
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

electerm是electerm组织的一款终端仿真程序。 electerm 3.15.186之前版本存在处理逻辑错误漏洞，该漏洞源于通过客户端控制的func值在src/app/server/dispatch-center.js的upgrade-func和src/app/server/fs.js的handleFs中调用非预期内部函数，暴露Upgrade和fsExport方法，可执行命令、打开文件、修改文件系统或终止进程。

CVSS 8.8 · High EPSS 0.75% · P54

Affected Version Matrix 1

VendorProduct Version RangeStatus
electerm electerm < 3.15.186 affected
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I. Basic Information for CVE-2026-73226

Vulnerability Information
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Vulnerability Title
Electerm WebSocket `upgrade-func` and `fs` handlers allow arbitrary method/function invocation due to missing method-name allowlist
Source: CVE Program / CVE List V5
Vulnerability Description
electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.15.186, electerm allows an authenticated WebSocket client to invoke unintended internal functions through client-controlled func values in upgrade-func in src/app/server/dispatch-center.js and handleFs in src/app/server/fs.js, exposing Upgrade and fsExport methods that can execute commands, open files, mutate the filesystem, or terminate the process. This issue is fixed in version 3.15.186.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
动态管理代码资源的控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
electerm 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
electerm是electerm组织的一款终端仿真程序。 electerm 3.15.186之前版本存在处理逻辑错误漏洞，该漏洞源于通过客户端控制的func值在src/app/server/dispatch-center.js的upgrade-func和src/app/server/fs.js的handleFs中调用非预期内部函数，暴露Upgrade和fsExport方法，可执行命令、打开文件、修改文件系统或终止进程。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
electerm electerm < 3.15.186 -

II. Public POCs for CVE-2026-73226

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 10136 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-73226

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Patches & Fixes for CVE-2026-73226 (2)

Vendor Advisories for CVE-2026-73226 (1)

Vendor Pages for CVE-2026-73226 (1)

Same Patch Batch · electerm · 2026-08-11 · 5 CVEs total

CVE-2026-73224 8.8 HIGH Electerm check folder size function may get attacked by unsafe folder name
CVE-2026-73225 8.1 HIGH electerm: Path traversal in FTP/SFTP recursive folder download via unsanitized server file
CVE-2026-73223 8.1 HIGH electerm: Path traversal in editWithSystemEditor temp file path via unsanitized SFTP filen
CVE-2026-73227 8.1 HIGH electerm's RDP clipboard file download may parse unsafe file name

IV. Related Vulnerabilities

Same product: electerm
Same vendor: electerm
Same weakness: CWE-913

V. Comments for CVE-2026-73226

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