---
cve: "CVE-2026-43941"
severity: "CRITICAL"
cvss: 9.6
epss: "0.4%"
vendor: "electerm"
kev: false
exploited: false
published: "2026-05-08 04:16:23"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T10:49:03+01:00"
---

# CVE-2026-43941

> 9.6 CRITICAL · 🧪 PoC

## Beschreibung

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 execution or local file access on the victim's machine, requiring only that the victim clicks a displayed link. At time of publication, there are no publicly available patches.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-05-08 21:28:44
- CNA-CVSS: **9.6** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-601** — URL Redirection to Untrusted Site
  The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
- **CWE-88** — Improper Neutralization of Argument Delimiters in a Command (Argument Injection)
  The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.

## Angriffsmuster (CAPEC)

- [CAPEC-178 — Cross-Site Flashing](https://capec.mitre.org/data/definitions/178.html) _(Severity: Medium)_

## Referenzen

- <https://github.com/electerm/electerm/security/advisories/GHSA-fwf6-j56g-m97c>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-43941/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_