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CVE-2026-43944: electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

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CRITICAL 9.6UPGRADE

CVE-2026-43944 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. From versions 3.0.6 to before 3.8.15, electerm is vulnerable to arbitrary local code execution via deep links, CLI --opts, or crafted shortcuts. Exploit requires clicking a crafted electerm://... link or opening a crafted shortcut/command that launches electerm with attacker-controlled opts. This issue has been patched in version 3.8.15.

Why this priority

  • Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score9.6 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.4% (top 70%)
CISA exploited listNo
WeaknessCWE-20, CWE-94, CWE-829
Published2026-05-08
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: electerm project

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

Am I affected?

Timeline

electerm project electerm UPGRADE
Affected: >= 3.0.6 and < 3.8.15
Fixed in: 3.8.15
Safe to downgrade to: a release before 3.0.6
1. Check installed version
apt-cache policy electerm || rpm -q electerm || electerm --version
2. UPGRADE to 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.
3. If no update is available yet, DOWNGRADE to a release before 3.0.6 (Debian / Ubuntu)
apt-cache madison electerm sudo apt install electerm=<VERSION_BEFORE_3.0.6> sudo apt-mark hold electerm
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list electerm sudo dnf downgrade electerm-<VERSION_BEFORE_3.0.6> sudo dnf versionlock add electerm
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
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-2026-43944?

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

Is CVE-2026-43944 being exploited?

CVE-2026-43944 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-2026-43944 affect?

CVE-2026-43944 affects electerm. Severity is critical (CVSS 9.6). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. From versions 3.0.6 to before 3.8.15, electerm is vulnerable to arbitrary local code execution via deep links, CLI --opts, or crafted shortcuts. Explo

How urgent is CVE-2026-43944?

Priority 41/100. Critical severity

Software pages

WinRM and RDP vulnerabilities

Related CVEs

References

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