CVE-2026-43940: electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

Q: How do I fix CVE-2026-43940?

electerm: upgrade to 3.7.16. Exact commands for each OS are on this page.

Q: Is CVE-2026-43940 being exploited?

CVE-2026-43940 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-43940 affect?

CVE-2026-43940 affects electerm. Severity is high (CVSS 8.4). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to version 3.7.16, the runWidget function in src/app/widgets/load-widget.js constructs a file path by directly concatenating user‑supplied widge

Routine

HIGH 8.4UPGRADE

CVE-2026-43940 is a high-severity flaw (CVSS 8.4) affecting electerm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to version 3.7.16, the runWidget function in src/app/widgets/load-widget.js constructs a file path by directly concatenating user‑supplied widget identifiers without any sanitisation. Because runWidget is exposed to the renderer process via an asynchronous IPC handler with no input validation, an attacker who achieves JavaScript execution inside the re

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-22, CWE-829
Published	2026-05-08
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: electerm project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-08 04:16 UTCPublished CVE record published
2026-06-17 10:50 UTCUpdated Record last modified

electerm project electerm UPGRADE

Affected: < 3.7.16

Fixed in: 3.7.16

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy electerm || rpm -q electerm || electerm --version

2. UPGRADE to 3.7.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade electerm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade electerm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-43940?

electerm: upgrade to 3.7.16. Exact commands for each OS are on this page.

Is CVE-2026-43940 being exploited?

CVE-2026-43940 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-43940 affect?

CVE-2026-43940 affects electerm. Severity is high (CVSS 8.4). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to version 3.7.16, the runWidget function in src/app/widgets/load-widget.js constructs a file path by directly concatenating user‑supplied widge

How urgent is CVE-2026-43940?

Priority 31/100. High severity

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-45787 CRITICAL 9.1 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-45353 HIGH 7.8 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-43944 CRITICAL 9.6 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-43943 HIGH 7.8 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-43942 MEDIUM 5.5 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

References

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