CVE-2026-43943

electerm: RCE via malicious SSH server filename in openFileWithEditor

Published May 8, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to version 3.7.9, a code execution (RCE) vulnerability exists in electerm's SFTP open with system editor or "Edit with custom editor" feature. When a user opts to edit a file using open with system editor or open with a custom editor, the filename is passed directly into a command line without sanitization. A malicious actor controlling the SSH server or user OS can exploit this by crafting a filename containing shell metacharacters. If a victim subsequently attempts to edit this file, the injected commands are executed on their machine with the user's privileges. This could allow the attacker to run arbitrary code, install malware, or move laterally within the network. This issue has been patched in version 3.7.9.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-q4p8-8j9m-8hxj Electerm Security Vulnerability: RCE via malicious SSH server filename in openFileWithEditor
History
Type Values Removed Values Added
First Time appeared Electerm
Electerm electerm
Vendors & Products Electerm
Electerm electerm
Type Values Removed Values Added
First Time appeared Electerm Project
Electerm Project electerm
CPEs cpe:2.3:a:electerm_project:electerm:*:*:*:*:*:*:*:*
Vendors & Products Electerm Project
Electerm Project electerm
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to version 3.7.9, a code execution (RCE) vulnerability exists in electerm's SFTP open with system editor or "Edit with custom editor" feature. When a user opts to edit a file using open with system editor or open with a custom editor, the filename is passed directly into a command line without sanitization. A malicious actor controlling the SSH server or user OS can exploit this by crafting a filename containing shell metacharacters. If a victim subsequently attempts to edit this file, the injected commands are executed on their machine with the user's privileges. This could allow the attacker to run arbitrary code, install malware, or move laterally within the network. This issue has been patched in version 3.7.9.
Title electerm: RCE via malicious SSH server filename in openFileWithEditor
Weaknesses CWE-78
CWE-88
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 8, 2026, 2:44 PM
Reserved
May 4, 2026, 4:59 PM
Status
Analyzed
Published
May 8, 2026, 4:16 AM
Modified
Nov 11, 2026, 11:10 PM