CVE-2026-64621

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

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, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: Elevated riskExposed: 0

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
7.3(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity73% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Jul 20, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic

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

https://www.vulncheck.com/advisories/freerdp-before-double-free-via-selectedmonitors
github Patch Available🟡 PoC Available

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 / EcosystemFixed in / 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 rangeFixed inDependents
freerdp22.10.0+dfsg1-1 ... 2.9.0+dfsg1-1~bpo11+1 (32 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
freerdp22.10.0+dfsg1-1 ... 2.11.7+dfsg1-6~deb12u1 (13 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.31.0+dfsg-1 (44 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
freerdp33.15.0+dfsg-2.1 ... 3.27.1+dfsg-1 (35 versions)3.28.0+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 122× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 213 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64621?
CVE-2026-64621 is a high vulnerability 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 disclosed?
CVE-2026-64621 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64621 actively exploited?
CVE-2026-64621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.1% of all scored CVEs.
What is the CVSS score of CVE-2026-64621?
CVE-2026-64621 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-64621?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64621, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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