CVEs / CVE-2026-111793
CVE-2026-111793: Openwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability
- Known exploited in the CISA KEV catalog since 10 Nov 2026
- medium 4.3 CVSS 3.1 (from the CNA)
- EPSS 0.63% chance of exploitation in the next 30 days, higher than 51% of CVEs (11 Nov 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Openwave Messaging (Ireland) Limited Webtop Media Transcoder | before 1.1.22.0 | 1.1.22.0 |
Exploitation
| In CISA KEV since | 10 Nov 2026 |
|---|---|
| Due date for US federal agencies | 24 Nov 2026 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-669 |
References
- CVE-2026-111793 on NVD
- CVE-2026-111793 in the CISA KEV catalog
- https://github.com/GISOpenwave/security-advisories-public/blob/main/CAN-2026-2032674.md (cited by CISA)
- https://jvn.jp/en/vu/JVNVU93403064/ (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk (cited by CISA)
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk (cited by CISA)
- https://github.com/GISOpenwave/security-advisories-public/blob/main/CAN-2026-2032674.md Third Party Advisory
- https://openwave.ai Product
- https://jvn.jp/en/vu/JVNVU93403064/ Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111793 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.