CVE-2026-45787: electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

Q: How do I fix CVE-2026-45787?

electerm: upgrade to 3.9.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-45787 being exploited?

CVE-2026-45787 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-2026-45787 affect?

CVE-2026-45787 affects electerm. Severity is critical (CVSS 9.1). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.9.5, deterministic AES-192-CBC with a fixed zero IV, constant KDF salt, and no MAC leads to confidentiality and integrity failures for sync

Q: How urgent is CVE-2026-45787?

Priority 37/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-45787 is a critical-severity flaw (CVSS 9.1) 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 3.9.5, deterministic AES-192-CBC with a fixed zero IV, constant KDF salt, and no MAC leads to confidentiality and integrity failures for synced bookmark/profile data. Attackers can crack common passwords across installs and perform undetected ciphertext bit-flips to alter config/bookmarks. This vulnerability is fixed in 3.9.5.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-326, CWE-329, CWE-353, CWE-759
Published	2026-05-28
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

2026-05-28 18:16 UTCPublished CVE record published
2026-06-17 10:52 UTCUpdated Record last modified

electerm project electerm UPGRADE

Affected: < 3.9.5

Fixed in: 3.9.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.9.5 (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-2026-45787?

electerm: upgrade to 3.9.5. Exact commands for each OS are on this page.

Is CVE-2026-45787 being exploited?

CVE-2026-45787 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-2026-45787 affect?

CVE-2026-45787 affects electerm. Severity is critical (CVSS 9.1). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.9.5, deterministic AES-192-CBC with a fixed zero IV, constant KDF salt, and no MAC leads to confidentiality and integrity failures for sync

How urgent is CVE-2026-45787?

Priority 37/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-45353 HIGH 7.8 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

References

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