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.
CVE-2026-43943
HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(medium)
- EPSS
- 6.3%
- KEV
- Not listed
Published
May 8, 2026
Last Modified
May 8, 2026
Advisory Details (3)
Auto-updated May 8, 2026Patch available. Sources: github.
github Patch Available
Security Vulnerability, RCE via malicious file name open or edit with custom editor in electerm · Advisory · electerm/electerm · GitHub
Affected: version >= 3.7.9
https://github.com/electerm/electerm/security/advisories/GHSA-q4p8-8j9m-8hxjgeneric
Release v3.7.9 · electerm/electerm · GitHub
https://github.com/electerm/electerm/releases/tag/v3.7.9generic
Improve open file function · electerm/electerm@24ce710 · GitHub
https://github.com/electerm/electerm/commit/24ce7103e264cffe6eb5476c0506a2379e6f8333Frequently asked(5)
What is CVE-2026-43943?
CVE-2026-43943 is a high vulnerability published on May 8, 2026. 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…
When was CVE-2026-43943 disclosed?
CVE-2026-43943 was first published in the National Vulnerability Database on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43943 actively exploited?
CVE-2026-43943 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43943?
CVE-2026-43943 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43943?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43943, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-43943
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