CVE-2026-109246

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM 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
Elevated

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

6.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (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

A fix is available — apply it.

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
6.5MEDIUMmedium 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
34th
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 2026-11-11). 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.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).

A fix is available. Apply it within your standard update timelines.

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.

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

November 2, 2026

Advisory Details (2)

Auto-updated Oct 14, 2026
🔬 Proof of concept available. Patch available. 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.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp22.10.0+dfsg1-1 ... 2.11.7+dfsg1-6~deb12u1 (13 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.33.0+dfsg-1 (51 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.31.1+dfsg-1~bpo13+1 (43 versions)
  • every version up to 3.32.0+dfsg-1: fixed in 3.32.0+dfsg-1
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 38× 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. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  2. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  3. 2026-11-11 18:33 UTCEchelonGraph re-scored
  4. 2026-11-11 18:33 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  5. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  6. 2026-11-11 06:21 UTCEchelonGraph re-scored
  7. 2026-11-11 06:21 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  8. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-11-06 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  14. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  15. 2026-11-04 00:59 UTCEchelonGraph re-scored
  16. 2026-11-04 00:59 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  17. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  18. 2026-11-02 21:06 UTCEchelonGraph re-scored
  19. 2026-11-02 21:06 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  20. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  21. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  22. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  23. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  24. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  25. 2026-10-29 14:39 UTCEchelonGraph re-scored
Show 29 more
  1. 2026-10-29 14:39 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  2. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-28 03:55 UTCOSV refresh
  4. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  6. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  7. 2026-10-25 14:53 UTCEchelonGraph re-scored
  8. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  11. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  13. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  14. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-10-18 12:27 UTCEchelonGraph re-scored
  16. 2026-10-18 12:27 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  17. 2026-10-18 11:56 UTCEchelonGraph re-scored
  18. 2026-10-18 11:56 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  19. 2026-10-18 05:06 UTCEchelonGraph re-scored
  20. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  21. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  22. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-10-14 20:40 UTCEchelonGraph re-scored
  24. 2026-10-14 20:39 UTCGHSA enrichmentGHSA-jpmc-9q62-wvpv · GitHub severity HIGH · GitHub CVSS 6.5
  25. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  26. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  27. 2026-10-12 17:28 UTCEchelonGraph re-scored
  28. 2026-10-12 16:28 UTCEchelonGraph re-scoredFirst assessed: 6.5 MEDIUM
  29. 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 November 2, 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 (34th 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?
A fix for CVE-2026-109246 is available: update to the fixed version the vendor names in its advisory. 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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