4.3

CVE-2026-111793: Openwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability

KEV
Undergoing analysis
Published 16-10-2026Last modified 10-11-2026

Vulnerability summary

CVE-2026-111793 is a medium (CVSS 4.3) vulnerability in Openwave Messaging Limited Webtop Media Transcoder. It is known to be exploited: CISA lists it, first on 10-11-2026. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.9% of scored vulnerabilities.

Priority
Act nowlisted as exploited

Listed as exploited by CISA (10-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · Change unavailable
KEVExploited in the wildCritical · listed in 1 catalog
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 16-10-2026
    PublishedVulnerability first disclosed.
  2. 10-11-2026
    Added to CISA KEVExploitedOpenwave Messaging Limited Webtop Media Transcoder Incorrect Resource Transfer Between Spheres Vulnerability
  3. 10-11-2026
    Last modifiedVulnerability information updated.
  4. 24-11-2026
    CISA remediation dueUpcomingApply mitigations per vendor instructions.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

17-10-202610-11-2026

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
10-11-2026
Federal due date
24-11-2026
ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

CISA 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. github.com/GISOpenwave/security-advisories-public/blob/main/CAN-2026-2032674.md jvn.jp/en/vu/JVNVU93403064/ nvd.nist.gov/vuln/detail/CVE-2026-111793

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Openwave messaging (ireland) limited1 product

1 vendor · 1 product

References

4 links