CVE-2026-73224: Electerm check folder size function may get attacked by unsafe folder name

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-11 · updated 2026-09-09
Weakness: CWE-78

Description

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.15.120, electerm allows a malicious FTP or SFTP server to execute arbitrary commands when a user downloads a crafted folder and invokes Properties and Calculate Size because calcLocal in src/client/components/sftp/file-info-modal.jsx inserts the server-controlled folder name into a du -sh shell command without safely escaping single quotes. This issue is fixed in version 3.15.120.

Affected products

electerm: before 3.15.120

References

https://github.com/electerm/electerm/commit/36b16fb66936bb7c65fbcdf706dfd1b77f0750a7
https://github.com/electerm/electerm/releases/tag/v3.15.120
https://github.com/electerm/electerm/security/advisories/GHSA-4wx8-4m69-8rw5

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