CVE-2026-64621

HIGHPre-NVD 7.37.3
EchelonGraph scoreMEDIUM confidence

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

Score 7.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-20. A secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-45936 (ENISA EUVD) · GHSA-7pv2-4c55-cg52 (GitHub Security Advisories)Source: ENISA EUVD

7.3EG
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: 7.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

FreeRDP before 3.28.0 (affected 3.x through 3.27.1) contains a double-free vulnerability in freerdp_client_rdp_file_apply_to_settings() (client/common/file.c) when parsing the selectedmonitors field of a .rdp connection file. The MonitorIds array is allocated through the settings object, and a raw non-owning pointer to it is freed on the strtoul error path without clearing settings->MonitorIds, leaving it dangling; at teardown freerdp_settings_free() frees the same buffer again. An attacker who convinces a victim to open a crafted .rdp file with oversized monitor tokens can trigger a size-controlled double-free in any FreeRDP CLI client (xfreerdp/sdl-freerdp/wlfreerdp) in the default configuration.

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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)
Severity73% × 45%
Impact severity (EG Severity): CVSS 7.3 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
29th
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 (7.3): severity, escalated by confirmed exploitation. This CVE's 7.3 is its impact severity (EG Severity), not escalated.

EG Severity
7.3 HIGHCVSS-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 2026-10-24). 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: 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.

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

July 20, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Jul 20, 2026
Patch available. Sources: github_commit, github.
Web page

FreeRDP before 3.28.0 Double-Free via selectedmonitors | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-before-double-free-via-selectedmonitors
GitHub advisoryMentions a patch (unverified)

Double-free of `MonitorIds` when a FreeRDP client parses a malformed `selectedmonitors` in a `.rdp` file · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f27x-frr8-j9hc
GitHub commit

commit 1f7a716d39b5 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 1f7a716d39b5 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/1f7a716d39b5605bb8a83b0c3c97a6ce386609ef

Vendor Advisories for CVE-2026-64621(3)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatfreerdp-2:3.10.3-3.el10_0.112026-08-24redhat
redhatfreerdp-2:3.10.3-12.el10_2.82026-08-13redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp22.10.0+dfsg1-1 ... 2.9.0+dfsg1-1~bpo11+1 (32 versions)
  • every version on: no fix on record
—
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 ... 3.32.1+dfsg-1~bpo13+1 (49 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.27.1+dfsg-1 (35 versions)
  • every version up to 3.28.0+dfsg-1: fixed in 3.28.0+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 50× 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.

Showing the most recent 100 of 297 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 197 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-25 14:12 UTCEG score recompute
  5. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  6. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-10-20 18:43 UTCEG score recompute
  10. 2026-10-20 18:43 UTCVendor advisory
  11. 2026-10-20 18:43 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  12. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-18 03:22 UTCEG score recompute
  16. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  21. 2026-10-13 11:38 UTCEG score recompute
  22. 2026-10-13 11:38 UTCVendor advisory
  23. 2026-10-13 11:38 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  25. 2026-10-12 15:47 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:32 UTCEG score recompute
  2. 2026-10-11 16:47 UTCEG score recompute
  3. 2026-10-11 14:08 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-04 14:57 UTCEG score recompute
  13. 2026-10-04 14:57 UTCVendor advisory
  14. 2026-10-04 14:57 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  18. 2026-10-01 07:45 UTCEG score recompute
  19. 2026-10-01 07:45 UTCVendor advisory
  20. 2026-10-01 07:45 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-09-28 06:26 UTCEG score recompute
  24. 2026-09-28 06:26 UTCVendor advisory
  25. 2026-09-28 06:26 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  26. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  27. 2026-09-24 03:30 UTCEG score recompute
  28. 2026-09-24 03:30 UTCVendor advisory
  29. 2026-09-24 03:30 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  30. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  31. 2026-09-23 01:44 UTCEG score recompute
  32. 2026-09-23 01:44 UTCVendor advisory
  33. 2026-09-23 01:44 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  34. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  35. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  36. 2026-09-18 03:59 UTCEG score recompute
  37. 2026-09-18 03:59 UTCVendor advisory
  38. 2026-09-18 03:59 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  39. 2026-09-17 05:15 UTCEG score recompute
  40. 2026-09-17 05:15 UTCVendor advisory
  41. 2026-09-17 05:15 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  42. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  43. 2026-09-16 12:49 UTCEG score recompute
  44. 2026-09-16 12:49 UTCVendor advisory
  45. 2026-09-16 12:49 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  46. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  47. 2026-09-14 04:00 UTCEG score recompute
  48. 2026-09-14 04:00 UTCVendor advisory
  49. 2026-09-14 04:00 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  50. 2026-09-13 16:02 UTCVendor advisory
  51. 2026-09-13 16:02 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  52. 2026-09-13 03:20 UTCEG score recompute
  53. 2026-09-13 03:20 UTCVendor advisory
  54. 2026-09-13 03:20 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  55. 2026-09-12 10:00 UTCVendor advisory
  56. 2026-09-12 10:00 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  57. 2026-09-11 21:31 UTCEG score recompute
  58. 2026-09-11 21:31 UTCVendor advisory
  59. 2026-09-11 21:31 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  60. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  61. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  62. 2026-09-11 09:30 UTCEG score recompute
  63. 2026-09-11 09:30 UTCVendor advisory
  64. 2026-09-11 09:30 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  65. 2026-09-09 11:59 UTCEG score recompute
  66. 2026-09-09 11:59 UTCVendor advisory
  67. 2026-09-09 11:59 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  68. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  69. 2026-09-07 22:58 UTCEG score recompute
  70. 2026-09-07 22:58 UTCVendor advisory
  71. 2026-09-07 22:58 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3
  72. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  73. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  74. 2026-09-06 11:48 UTCVendor advisory
  75. 2026-09-06 11:48 UTCGHSA enrichmentGHSA-7pv2-4c55-cg52 · GitHub severity CRITICAL · GitHub CVSS 7.3

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Frequently asked(5)

What is CVE-2026-64621?
CVE-2026-64621 is a high-severity vulnerability; its CVE record was published on July 20, 2026. FreeRDP before 3.28.0 (affected 3.x through 3.27.1) contains a double-free vulnerability in freerdpclientrdpfileapplytosettings() (client/common/file.c) when parsing the selectedmonitors field of a .rdp connection file. The MonitorIds array is allocated through the settings object, and a raw…
When was CVE-2026-64621 made public?
CVE-2026-64621 was made public on July 6, 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 July 20, 2026. EchelonGraph's copy of the record carries a last-modified date of July 28, 2026; the record at its source may have been updated since.
Is CVE-2026-64621 actively exploited?
CVE-2026-64621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64621?
CVE-2026-64621 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-64621?
A fix for CVE-2026-64621 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64621 are linked in the Vendor Advisories panel on this page.

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