CVERadar
CRITICAL · CVSS 4.0 9.4EPSS 0.36% (p30)Threat level 47

CVE-2026-124490: CVE-2026-124490: OpenEMR before 8.3.0 contains a path traversal vulnerability in the RingCentral RCFaxClien…

Unknown · OpenEMR · NVD published 2026-11-08 · posted 2026-11-08 · last modified 2026-11-08

CVE-2026-124490 at a glance

CVE-2026-124490 is a critical-severity Path Traversal vulnerability in OpenEMR, with a CVSS 4.0 base score of 9.4. NVD published it on 2026-11-08 and classifies the weakness as CWE-73. FIRST EPSS puts the probability of exploitation activity in the next 30 days at 0.36% (percentile 29.6, scored 2026-11-09). NVD does not list a fixed version, so the vendor advisory is the reference for the fix. Its CVERadar threat level is 47/100.

What it is

OpenEMR before 8.3.0 contains a path traversal vulnerability in the RingCentral RCFaxClient disposeDocument() method of oe-module-faxsms that allows authenticated attackers to read and write arbitrary files via the file_path parameter. Attackers can use action=download to read credentials and source code, or action=setup with base64 content to write web-executable files for code execution.

WeaknessCWE-73 definition
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X (source: VulnCheck)
ATT&CK tacticsn/a

No ATT&CK techniques could be mapped or inferred for this CVE yet.

Patches, mitigations and detection

Fixed versions

NVD does not list a fixed version for this CVE. Use the vendor advisory below.

Derived from the NVD CPE configuration (versionEndExcluding / versionEndIncluding). Always confirm with the vendor advisory.

Vendor advisories and patches

No vendor-tagged reference yet; see the full reference list.

Detection Generic guidance

    Response checklist Generic guidance

    1. Inventory: find every instance of the affected product and version (include internet-facing and forgotten ones).
    2. Patch or mitigate per the vendor advisory; if you cannot patch, remove internet exposure or apply the vendor workaround.
    3. Assume compromise if the system was exposed before patching: hunt for the indicators in the advisory and review logs back to the disclosure date.
    4. Rotate credentials and secrets stored on or used by the affected system if compromise cannot be ruled out.

    Sources