CVE-2026-111855: CWE-22 Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) in Tektronix 3 Series MDO
Description
CVE-2026-111855 is a path traversal vulnerability in the web management interface of Tektronix 3 Series MDO devices before version 1.21.1. This flaw allows remote attackers to read arbitrary files accessible to the application by supplying crafted file paths. Exploitation may be possible without authentication depending on device configuration. The vulnerability has a high severity score of 7.5 and impacts confidentiality but not integrity or availability.
CVSS v3.1
Score 7.5high
Affected software
Tektronix
3 Series MDO
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Tektronix 3 Series MDO devices prior to version 1.21.1 contain a CWE-22 improper limitation of a pathname to a restricted directory vulnerability in their web management interface. This path traversal issue arises from insufficient validation of user-supplied file paths, enabling remote attackers to access arbitrary files readable by the application. The vulnerability can be exploited remotely without authentication in some configurations, posing a significant confidentiality risk. The CVSS 3.1 base score is 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Potential Impact
Successful exploitation allows remote attackers to read arbitrary files on the affected device, potentially exposing sensitive information. The vulnerability affects confidentiality but does not impact integrity or availability. Depending on device configuration, no authentication may be required to exploit this issue, increasing the risk.
Mitigation Recommendations
A fix is available in Tektronix 3 Series MDO firmware version 1.21.1 and later. Users should upgrade to version 1.21.1 or above to remediate this vulnerability. No vendor advisory was provided in the input, so verify the patch status with Tektronix official sources before deployment.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-10-17T01:06:42.131Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad2db192cdf04f656b6b088
Added to database: 10/17/2026, 02:19:05 UTC
Last enriched: 10/17/2026, 02:33:17 UTC
Last updated: 10/17/2026, 02:33:48 UTC
Views: 4
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