How severe is CVE-2026-45058?

CVE-2026-45058 has a CVSS 4.0 base score of 9.4, rated critical severity.

Is CVE-2026-45058 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-45058?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-45058 have an EU (EUVD) identifier?

Yes. CVE-2026-45058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32961.

When was CVE-2026-45058 published?

CVE-2026-45058 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-45058

CVE-2026-45058 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 4.0 base score 9.4)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32961
Weakness: CWE-94
Published: 2026-05-28
Last modified: 2026-06-17

Description

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In 3.8.8 and earlier, there is persistent local-pty code execution via imported bookmarks or compromised sync targets. Affects users who import bookmark JSON files or who have electerm sync configured (gist/WebDAV). The attacker can inject exec* fields or global config to cause remote code to run when a bookmark is opened or when sync is applied.

Frequently asked questions

What is CVE-2026-45058?: electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In 3.8.8 and earlier, there is persistent local-pty code execution via imported bookmarks or compromised sync targets. Affects users who import bookmark JSON files or who have electerm sync configured (gist/WebDAV). The attacker can inject exec* fields or global config to cause remote code to run when a bookmark is opened or when sync is applied.
How severe is CVE-2026-45058?: CVE-2026-45058 has a CVSS 4.0 base score of 9.4, rated critical severity.
Is CVE-2026-45058 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-45058?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-45058 have an EU (EUVD) identifier?: Yes. CVE-2026-45058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32961.
When was CVE-2026-45058 published?: CVE-2026-45058 was published on 2026-05-28 and last updated on 2026-06-17.

References

https://github.com/electerm/electerm/security/advisories/GHSA-jgg9-rw32-44pj

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