RCE in Electerm
CVE-2026-43943
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (13.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
- Electerm — versions < 3.7.9
- Electerm Project
Weakness classification (CWE)
References
- github.com/electerm/electerm/security/advisories/GHSA-q4p8-8j9m-8hxj (Patch, Vendor Advisory)
- github.com/electerm/electerm/commit/24ce7103e264cffe6eb5476c0506a2379e6f8333 (Patch)
- github.com/electerm/electerm/releases/tag/v3.7.9 (Release Notes)
Frequently asked questions
- What is CVE-2026-43943?
- CVE-2026-43943 is a high-severity vulnerability in Electerm, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-05-08.
- How severe is CVE-2026-43943?
- High severity. CVSS v3 base score is 7.8 out of 10.