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MEDIUM severity

CVE-2026-111793 — Webtop Media Transcoder

MEDIUM

CVE-2026-111793 is a medium-severity (CVSS 4.3) CWE-669 vulnerability in Openwave Messaging (Ireland) Limited Webtop Media Transcoder. A fix is available — see the affected versions and patch details below.

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…

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-111793.

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk+0.40%
Lower risk than most CVEs51th percentile — riskier than 51% of all scored CVEsHighest risk
0.00%0.38%0.76%1.14%0.2%0.6%Nov 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

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 Products

1 product · 1 configurations
Application
Webtop Media TranscoderOpenwave Messaging (Ireland) Limited
< 1.1.22.0
1 version
0

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every Openwave Messaging (Ireland) Limited Webtop Media Transcoder deployment and check each version against the affected-products list above.

  2. Fix

    Apply the Openwave Messaging (Ireland) Limited Webtop Media Transcoder security patch or hotfix for CVE-2026-111793 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

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.
O3 Security · Runtime Protection

Is CVE-2026-111793 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

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CVE-2026-111793: Webtop Media Transcoder (KEV)