CVE-2026-111793

CRITICALPre-NVD 4.39.0
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than the CVSS score beside it.

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-11-10), indicating real-world exploitation has been confirmed by US federal agencies. A secondary CVSS source baseline 4.3 retained for reference (NVD's own analysis pending). The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 4.3 MEDIUM under GitHub Security Advisory CVSS. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: CISA Known Exploited Vulnerabilities catalog, EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — KEV-added in the last 14 daysExploited in the wild

Also known asEUVD-2026-103135 (ENISA EUVD) · GHSA-5353-r4qc-2252 (GitHub Security Advisories)Source: ENISA EUVD

9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at every mission impact level
CISA-KEV: ExploitedEPSS PROB: 0.6%CVSS: 4.3Exploit: No code on recordExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

The CVE record's CNA (MITRE Corporation) lists Openwave Messaging (Ireland) Limited Webtop Media Transcoder versions before 1.1.22.0 as affected. No release containing a fix is confirmed on record.

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 v3
4.3
EG Score
9.0CRITICALhigh confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity43% × 45%
Impact severity (EG Severity): CVSS 4.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation100% × 40%
Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.6%
EPSS %ILE
51st
KEV
⚠ Exploited

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the CISA KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 4.3 MEDIUM.

EG Severity
4.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-11). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 14 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: this CVE is in CISA's KEV catalog, and CISA's required action for it, quoted below, applies whether or not a fix is released.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 14 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: this CVE is in CISA's KEV catalog, and CISA's required action for it, quoted below, applies whether or not a fix is released.

The score's inputs: In CISA KEV yes (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

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.”

Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://github.com/GISOpenwave/security-advisories-public/blob/main/CAN-2026-2032674.md · https://jvn.jp/en/vu/JVNVU93403064/ · https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk · https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk · https://nvd.nist.gov/vuln/detail/CVE-2026-111793

Published

October 16, 2026

Last Modified

November 11, 2026

Advisory Details (3)

Auto-updated Nov 10, 2026
⚠️ Actively exploited (CISA KEV, CISA Vulnrichment). No fix on record yet. Sources: cisa.
CISA🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111793
Web page

JVNVU#93403064: Webtop Media Transcoder vulnerable to incorrect resource transfer between spheres

https://jvn.jp/en/vu/JVNVU93403064/
Web page

security-advisories-public/CAN-2026-2032674.md at main · GISOpenwave/security-advisories-public · GitHub

https://github.com/GISOpenwave/security-advisories-public/blob/main/CAN-2026-2032674.md

Vendor Advisories for CVE-2026-111793(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 17× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.6% · 51st percentile
  2. 2026-11-12 05:44 UTCEchelonGraph re-scored
  3. 2026-11-12 05:44 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  4. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.6% · 51st percentile
  5. 2026-11-11 05:27 UTCEchelonGraph re-scored
  6. 2026-11-11 05:27 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  7. 2026-11-11 04:59 UTCEchelonGraph re-scored
  8. 2026-11-11 04:59 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  9. 2026-11-10 21:48 UTCEchelonGraph re-scored
  10. 2026-11-10 21:47 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  11. 2026-11-10 20:27 UTCEchelonGraph re-scored
  12. 2026-11-10 20:27 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  13. 2026-11-10 20:07 UTCEchelonGraph re-scored
  14. 2026-11-10 20:07 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  15. 2026-11-10 19:41 UTCEchelonGraph re-scored
  16. 2026-11-10 19:41 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  17. 2026-11-10 19:33 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  18. 2026-11-10 19:33 UTCEchelonGraph re-scored▲ 4.70
  19. 2026-11-10 19:33 UTCCISA KEV update
  20. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  21. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  23. 2026-11-07 19:49 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub severity MODERATE · GitHub CVSS 4.3
  24. 2026-11-07 19:49 UTCEchelonGraph re-scored
  25. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.2% · 15th percentile
Show 30 more
  1. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  2. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  3. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  4. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  5. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  6. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  7. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  8. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  9. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  10. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  11. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  12. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  13. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  14. 2026-10-25 14:52 UTCEchelonGraph re-scored
  15. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-10-19 16:37 UTCEchelonGraph re-scored
  21. 2026-10-19 16:37 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub CVSS 4.3
  22. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-10-19 15:37 UTCEchelonGraph re-scored
  24. 2026-10-19 15:37 UTCGHSA enrichmentGHSA-5353-r4qc-2252 · GitHub CVSS 4.3
  25. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-10-18 05:05 UTCEchelonGraph re-scored
  27. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  28. 2026-10-16 19:46 UTCEchelonGraph re-scored
  29. 2026-10-16 18:44 UTCEchelonGraph re-scoredFirst assessed: 4.3 MEDIUM
  30. 2026-10-16 18:42 UTCMITRE cvelistV5first tracked

Frequently asked(6)

What is CVE-2026-111793?
CVE-2026-111793 is a critical-severity vulnerability; its CVE record was published on October 16, 2026. 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.
When was the CVE record for CVE-2026-111793 published?
The CVE record for CVE-2026-111793 was published on October 16, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 11, 2026; the record at its source may have been updated since.
Is CVE-2026-111793 actively exploited?
Yes. CISA added CVE-2026-111793 to the Known Exploited Vulnerabilities catalog on November 10, 2026, affecting Openwave Messaging Limited Webtop Media Transcoder. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation.
What is the CVSS score of CVE-2026-111793?
CVE-2026-111793 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending). EchelonGraph synthesises a secondary CVSS source + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2026-111793?
CVE-2026-111793 affects Openwave Messaging Limited Webtop Media Transcoder.
How do I remediate CVE-2026-111793?
No fix for CVE-2026-111793 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (MITRE Corporation) lists Openwave Messaging (Ireland) Limited Webtop Media Transcoder versions before 1.1.22.0 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-111793 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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