CVE-2026-49253

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{"affected": [{"affectedData": [{"product": "electerm", "vendor": "electerm", "versions": [{"status": "affected", "version": "< 3.11.11"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.11.11, electerm uses remote-supplied filenames directly with path.join() while receiving Zmodem and Trzsz transfers. In src/app/server/zmodem.js, prepareReceiveFile() joins the filename to the user-selected save path, and in src/app/server/trzsz.js, getUniqueFilePath(), the openSaveFile() callback, and the savedFilePaths mapping construct destinations without sanitization. A malicious SSH server or remote shell can provide a filename containing traversal components such as ../escaped.txt or ../../.bashrc. When the victim accepts the transfer and selects a download directory, electerm can write outside that directory and overwrite files accessible to the desktop user, potentially changing sensitive configuration or impairing availability. This issue is fixed in version 3.11.11."}, {"lang": "es", "value": "electerm es un cliente de terminal/ssh/sftp/telnet/puerto serie/RDP/VNC/Spice/ftp de c\u00f3digo abierto. Antes de la versi\u00f3n 3.11.11, electerm utiliza nombres de archivo proporcionados remotamente directamente con path.join() al recibir transferencias Zmodem y Trzsz. En src/app/server/zmodem.js, prepareReceiveFile() une el nombre de archivo a la ruta de guardado seleccionada por el usuario, y en src/app/server/trzsz.js, getUniqueFilePath(), la devoluci\u00f3n de llamada openSaveFile() y la asignaci\u00f3n savedFilePaths construyen destinos sin saneamiento. Un servidor SSH malicioso o shell remoto puede proporcionar un nombre de archivo que contiene componentes de recorrido como .. / escaped.txt o .. / .. / .bashrc. Cuando la v\u00edctima acepta la transferencia y selecciona un directorio de descarga, electerm puede escribir fuera de ese directorio y sobrescribir archivos accesibles para el usuario de escritorio, potencialmente cambiando la configuraci\u00f3n sensible o afectando la disponibilidad. Este problema est\u00e1 solucionado en la versi\u00f3n 3.11.11."}], "id": "CVE-2026-49253", "lastModified": "2026-10-27T13:10:00.360", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49253", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T19:31:22.919563Z", "version": "2.0.3"}}]}, "published": "2026-08-19T15:17:06.747", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/electerm/electerm/commit/fde153d677a170c5816368f6586647f3af4ef284"}, {"source": "security-advisories@github.com", "url": "https://github.com/electerm/electerm/releases/tag/v3.11.11"}, {"source": "security-advisories@github.com", "url": "https://github.com/electerm/electerm/security/advisories/GHSA-38j7-23hf-9mhc"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/electerm/electerm/security/advisories/GHSA-38j7-23hf-9mhc"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.11.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "electerm", "source": "cna", "vendor": "electerm"}, "product": "electerm", "vendor": "electerm"}], "created": "2026-08-19T16:00:04.406522+00:00", "updated": "2026-08-20T15:45:03.423207+00:00", "vendors": ["electerm", "electerm$PRODUCT$electerm"]}