CVE-2026-73227: electerm's RDP clipboard file download may parse unsafe file name

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% 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-22

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 RDP server to write attacker-controlled content outside the selected save directory because the RDP clipboard download path in src/client/components/rdp/file-transfer.js passes the server-controlled CLIPRDR filename fileInfo.name to osResolve without sanitization. This issue is fixed in version 3.15.120.

Affected products

electerm: before 3.15.120

References

https://github.com/electerm/electerm/commit/451bf3000672c00b0c3b148fbf3c148c205ce350
https://github.com/electerm/electerm/releases/tag/v3.15.120
https://github.com/electerm/electerm/security/advisories/GHSA-gm6q-5vpx-3mwf

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