CVE-2026-111793
Published 2026-10-16 · Updated 2026-11-10 · Source cve@mitre.org
Summary
CVE-2026-111793 is a medium-severity (CVSS 4.3) vulnerability in Openwave Messaging Limited Webtop Media Transcoder. CISA added it to the Known Exploited Vulnerabilities catalog on November 10, 2026, which means exploitation in the wild has been confirmed; US federal agencies must remediate it by November 24, 2026. CISA does not currently list it as used in ransomware campaigns.
Description
Openwave Webtop Media Transcoder does not enforce administrator-defined file type restrictions to restrict the file-types to be converted. This may allow an authenticated user to process and convert unintended document types if bypassing the Webmail experience.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CISA Known-Exploited Vulnerability
Product: Openwave Messaging Limited — Webtop Media Transcoder
Name: Openwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability
Date added: 2026-11-10 · Due: 2026-11-24
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.