CVE-2026-67305

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.4Exploit: Elevated riskExposed: 0

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

FreeRDP Windows client before 3.29.0 contains a heap buffer overflow vulnerability in the clipboard virtual channel when processing CLIPRDR_FILE_CONTENTS_RESPONSE PDUs without validating the server-provided size against the destination buffer. A malicious RDP server can send a response with a data payload significantly larger than requested, causing arbitrary heap memory corruption that may enable remote code execution when a user performs a paste operation.

CVSS v3
9.4
EG Score
9.4(medium)
EG Risk
58(Track*)
EG Risk 58/100SSVC: 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
Severity94% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

August 1, 2026

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Aug 1, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-windows-client-before-heap-buffer-overflow-via-cliprdr
github Patch Available🟡 PoC Available

FreeRDP Windows Client Cliprdr Virtual Channel Heap Buffer Overflow · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cj9v-h4hq-29jr

Vendor Advisories for CVE-2026-67305(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 56× in last 7d / 168× 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 168 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67305?
CVE-2026-67305 is a critical vulnerability published on August 1, 2026. FreeRDP Windows client before 3.29.0 contains a heap buffer overflow vulnerability in the clipboard virtual channel when processing CLIPRDRFILECONTENTS_RESPONSE PDUs without validating the server-provided size against the destination buffer. A malicious RDP server can send a response with a data…
When was CVE-2026-67305 disclosed?
CVE-2026-67305 was first published in the National Vulnerability Database on August 1, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67305 actively exploited?
CVE-2026-67305 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 59.8% of all scored CVEs.
What is the CVSS score of CVE-2026-67305?
CVE-2026-67305 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-67305?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67305, 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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