CVE-2026-111793 Openwave Messaging Limited Webtop Media Transcoder: software flaw
In plain words: A mistake in the software that attackers have found a way to abuse. Depends on the product — see the description and the vendor advisory.
Confirmed exploited by CISA on · US federal patch deadline Nov 24, 2026
What to do
- Install Openwave Messaging Limited's security update for Webtop Media Transcoder. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Openwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability
- Product
- Openwave Messaging Limited Webtop Media Transcoder
- CISA description
- 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.
- Type of flaw
- Software flaw (CWE-669)
- Confirmed exploited
- Nov 10, 2026
- US federal patch deadline
- Nov 24, 2026
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Answering about CVE-2026-111793 ·
Questions about CVE-2026-111793
Is CVE-2026-111793 being exploited?
Yes. CISA added CVE-2026-111793 to its Known Exploited Vulnerabilities catalog on Nov 10, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-111793?
Install Openwave Messaging Limited's security update for Webtop Media Transcoder. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2026-111793?
Only if you use Openwave Messaging Limited Webtop Media Transcoder. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.