Exploited vulnerability · CISA KEV

Is CVE-2026-111793 exploited? Yes: in CISA KEV since 10 Nov 2026

Gociux · Openwave Messaging Limited Webtop Media Transcoder · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-111793, Openwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 10 Nov 2026, 25 days after it was published. It affects Openwave Messaging Limited Webtop Media Transcoder. If you run it, CISA's required action is: 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.

What it is

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.

What to do

1. Check whether you run it. Look for Webtop Media Transcoder in your asset inventory, including appliances and cloud images. Stack check lists every exploited Openwave Messaging Limited CVE at once.
2. Apply the fix. 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.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 16 Oct 2026.
4. Get told next time. Email alerts when CISA adds a CVE for Openwave Messaging Limited.

References

• github.com/GISOpenwave/security-advisories-public/blob/main/CAN-2026-2
• jvn.jp/en/vu/JVNVU93403064/
• nvd.nist.gov/vuln/detail/CVE-2026-111793

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2026 · act-now radar.