Openwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability (CVE-2026-111793)
Severity: medium · Patch status: unknown · Since 2026-11-10 · CVE-2026-111793
Openwave Messaging Limited Webtop Media Transcoder contains an incorrect resource transfer between spheres vulnerability that may allow an authenticated user to process and convert unintended document types if bypassing the Webmail experience. CISA added CVE-2026-111793 to its Known Exploited Vulnerabilities catalog on Nov 10, 2026, which means attackers are exploiting it in the wild.
What to do
- 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.
- US federal agencies must remediate by Nov 24, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
