CVE-2026-43941: electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

Q: How do I fix CVE-2026-43941?

electerm: upgrade to newer than 3.8.15. Exact commands for each OS are on this page.

Q: Is CVE-2026-43941 being exploited?

CVE-2026-43941 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-2026-43941 affect?

CVE-2026-43941 affects electerm. Severity is critical (CVSS 9.6). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, Electerm's terminal hyperlink handler passes any URL clicked in the terminal directly to shell.openExternal without any

Q: How urgent is CVE-2026-43941?

Priority 42/100. Critical severity

This month

CRITICAL 9.6UPGRADE

CVE-2026-43941 is a critical-severity flaw (CVSS 9.6) 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. In versions 3.8.15 and prior, Electerm's terminal hyperlink handler passes any URL clicked in the terminal directly to shell.openExternal without any protocol validation. An attacker who controls terminal output (e.g., via a malicious SSH server, compromised remote host, or malicious plugin rendering terminal content) can thus achieve arbitrary code executio

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-88, CWE-601
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: <= 3.8.15

Fixed in: newer than 3.8.15

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.8.15 (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-2026-43941?

electerm: upgrade to newer than 3.8.15. Exact commands for each OS are on this page.

Is CVE-2026-43941 being exploited?

CVE-2026-43941 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-2026-43941 affect?

CVE-2026-43941 affects electerm. Severity is critical (CVSS 9.6). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, Electerm's terminal hyperlink handler passes any URL clicked in the terminal directly to shell.openExternal without any

How urgent is CVE-2026-43941?

Priority 42/100. Critical 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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