{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49253", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-28T14:33:01.179Z", "datePublished": "2026-08-19T14:31:55.683Z", "dateUpdated": "2026-08-21T19:31:45.169Z"}, "containers": {"cna": {"title": "electerm: Path Traversal in Zmodem and Trzsz Download Filename Handling", "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "lang": "en", "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/electerm/electerm/security/advisories/GHSA-38j7-23hf-9mhc", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/electerm/electerm/security/advisories/GHSA-38j7-23hf-9mhc"}, {"name": "https://github.com/electerm/electerm/commit/fde153d677a170c5816368f6586647f3af4ef284", "tags": ["x_refsource_MISC"], "url": "https://github.com/electerm/electerm/commit/fde153d677a170c5816368f6586647f3af4ef284"}, {"name": "https://github.com/electerm/electerm/releases/tag/v3.11.11", "tags": ["x_refsource_MISC"], "url": "https://github.com/electerm/electerm/releases/tag/v3.11.11"}], "affected": [{"vendor": "electerm", "product": "electerm", "versions": [{"version": "< 3.11.11", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-19T14:31:55.683Z"}, "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."}], "source": {"advisory": "GHSA-38j7-23hf-9mhc", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/electerm/electerm/security/advisories/GHSA-38j7-23hf-9mhc", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-21T19:31:22.919563Z", "id": "CVE-2026-49253", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-21T19:31:45.169Z"}}]}}

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