CVE-2026-109246

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-10-12. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this weekElevated

Also known asEUVD-2026-97690 (ENISA EUVD) · GHSA-jpmc-9q62-wvpv (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictPlan mitigationNo 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 (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: 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 (VulnCheck) lists FreeRDP versions before 3.32.0 as affected, and FreeRDP versions 3.32.0 as unaffected. No release containing a fix is confirmed on record.

FreeRDP before 3.32.0 contains a divide-by-zero vulnerability in the freerdp-shadow-cli shadow server: the frame id in a client's Frame Acknowledge PDU is stored without a range check, so the in-flight frame count in shadow_encoder_inflight_frames() can underflow. An authenticated client can acknowledge a frame id one greater than the last frame sent, causing shadow_encoder_create_frame_id() to divide by zero (SIGFPE) and terminate the process, disconnecting all viewers.

CVSS v3
6.5
EG Score
6.5MEDIUMhigh confidence
EG Risk
45
EG Risk 45/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (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.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

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

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)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; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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; Track* 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.

Exploitation public PoC (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (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

Published

October 12, 2026

Last Modified

October 18, 2026

Advisory Details (2)

Auto-updated Oct 14, 2026
🔬 Proof of concept available. No fix on record yet. Sources: github.
Web page

FreeRDP before 3.32.0 Shadow Server Divide-by-Zero via Frame Acknowledge PDU | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-before-3.32.0-shadow-server-divide-by-zero-via-frame-acknowledge-pdu
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

freerdp-shadow: client-supplied Frame Acknowledge id underflows the in-flight frame count and divides by zero (SIGFPE) · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698

Vendor Advisories for CVE-2026-109246(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 10× in last 7d / 35× 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 it from the CNA feed. 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). Most recent first.

  1. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  4. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  6. 2026-10-29 14:39 UTCEG score recompute
  7. 2026-10-29 14:39 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-10-28 03:55 UTCOSV refresh
  10. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-10-25 14:53 UTCEG score recompute
  14. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  16. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  17. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  18. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  19. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-10-18 12:27 UTCEG score recompute
  22. 2026-10-18 12:27 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  23. 2026-10-18 11:56 UTCEG score recompute
  24. 2026-10-18 11:56 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  25. 2026-10-18 05:06 UTCEG score recompute
Show 10 more
  1. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  2. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  3. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  4. 2026-10-14 20:40 UTCEG score recompute
  5. 2026-10-14 20:39 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  6. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  7. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  8. 2026-10-12 17:28 UTCEG score recompute
  9. 2026-10-12 16:28 UTCEG score recomputeFirst assessed: 6.5 MEDIUM
  10. 2026-10-12 16:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-109246?
CVE-2026-109246 is a medium-severity vulnerability; its CVE record was published on October 12, 2026. FreeRDP before 3.32.0 contains a divide-by-zero vulnerability in the freerdp-shadow-cli shadow server: the frame id in a client's Frame Acknowledge PDU is stored without a range check, so the in-flight frame count in shadow_encoder_inflight_frames() can underflow. An authenticated client can…
When was CVE-2026-109246 made public?
CVE-2026-109246 was made public on September 28, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on October 12, 2026. EchelonGraph's copy of the record carries a last-modified date of October 18, 2026; the record at its source may have been updated since.
Is CVE-2026-109246 actively exploited?
CVE-2026-109246 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-109246?
CVE-2026-109246 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-109246?
No fix for CVE-2026-109246 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 (VulnCheck) lists FreeRDP versions before 3.32.0 as affected, and FreeRDP versions 3.32.0 as unaffected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-109246 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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