CVE-2026-63652

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 72% 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 — Patch released this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

A fix is available — apply it.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats in channels/rdpsnd/server/rdpsnd_main.c frees context->client_formats on a malformed Client Audio Formats PDU without clearing the owning pointer or num_client_formats. An authenticated RDP client can trigger an error such as a cbSize larger than the remaining record, leave the dangling pointer in the server context, and cause rdpsnd_server_context_free to free the same allocation again at session teardown. This reliably terminates the server and can create allocator-dependent heap corruption. This issue is fixed in version 3.28.0.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Double-free of `client_formats` in the rdpsnd server channel on a malformed Client Audio Formats PDU · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9g22-w2gr-vcmp
github_release Patch Available

3.28.0

Patch available: FreeRDP/FreeRDP 3.28.0

https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0
github_pr

Range checks

Fix merged in FreeRDP/FreeRDP PR #12993 on 2026-07-02 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/pull/12993
github_commit

commit caf653c0ba1c (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit caf653c0ba1c — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/caf653c0ba1c75ec8f298d1baa59770102a5d14c

Vendor Advisories for CVE-2026-63652(1)

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_0.162026-09-17redhat
redhatfreerdp-2:3.10.3-12.el10_2.102026-08-31redhat

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

(3 across 3 ecosystems)
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.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 22× in last 7d / 84× 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.

  1. 2026-09-19 04:44 UTCEG score recompute
  2. 2026-09-19 04:44 UTCVendor advisory
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 16:36 UTCVendor advisory
  5. 2026-09-18 03:45 UTCEG score recompute
  6. 2026-09-18 03:45 UTCVendor advisory
  7. 2026-09-17 15:39 UTCVendor advisory
  8. 2026-09-17 03:32 UTCVendor advisory
  9. 2026-09-16 14:33 UTCEG score recompute
  10. 2026-09-16 14:33 UTCVendor advisory
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-16 02:07 UTCVendor advisory
  14. 2026-09-15 14:00 UTCEG score recompute
  15. 2026-09-15 14:00 UTCVendor advisory
  16. 2026-09-15 01:53 UTCVendor advisory
  17. 2026-09-14 13:46 UTCVendor advisory
  18. 2026-09-14 01:31 UTCEG score recompute
  19. 2026-09-14 01:31 UTCVendor advisory
  20. 2026-09-13 13:25 UTCVendor advisory
  21. 2026-09-13 01:19 UTCEG score recompute
  22. 2026-09-13 01:19 UTCVendor advisory
  23. 2026-09-12 13:12 UTCVendor advisory
  24. 2026-09-12 01:06 UTCEG score recompute
  25. 2026-09-12 01:06 UTCVendor advisory
Show 62 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 12:59 UTCEG score recompute
  3. 2026-09-11 12:59 UTCVendor advisory
  4. 2026-09-11 09:37 UTCEPSS rescore
  5. 2026-09-11 00:26 UTCVendor advisory
  6. 2026-09-10 12:19 UTCEG score recompute
  7. 2026-09-10 12:19 UTCVendor advisory
  8. 2026-09-09 22:36 UTCVendor advisory
  9. 2026-09-09 14:42 UTCVendor advisory
  10. 2026-09-09 02:34 UTCEG score recompute
  11. 2026-09-09 02:34 UTCVendor advisory
  12. 2026-09-08 22:01 UTCEPSS rescore
  13. 2026-09-08 06:06 UTCVendor advisory
  14. 2026-09-07 17:56 UTCEG score recompute
  15. 2026-09-07 17:56 UTCVendor advisory
  16. 2026-09-07 16:01 UTCEPSS rescore
  17. 2026-09-07 05:50 UTCVendor advisory
  18. 2026-09-06 17:43 UTCEG score recompute
  19. 2026-09-06 17:43 UTCVendor advisory
  20. 2026-09-06 13:47 UTCEPSS rescore
  21. 2026-09-06 05:36 UTCVendor advisory
  22. 2026-09-05 17:29 UTCEG score recompute
  23. 2026-09-05 17:29 UTCVendor advisory
  24. 2026-09-05 15:31 UTCEPSS rescore
  25. 2026-09-05 05:23 UTCVendor advisory
  26. 2026-09-04 17:17 UTCEG score recompute
  27. 2026-09-04 17:17 UTCVendor advisory
  28. 2026-09-04 05:09 UTCEG score recompute
  29. 2026-09-04 05:09 UTCVendor advisory
  30. 2026-09-04 05:07 UTCEPSS rescore
  31. 2026-09-03 16:30 UTCVendor advisory
  32. 2026-09-03 04:23 UTCVendor advisory
  33. 2026-09-02 16:06 UTCEG score recompute
  34. 2026-09-02 16:06 UTCVendor advisory
  35. 2026-09-02 14:12 UTCEPSS rescore
  36. 2026-09-02 03:19 UTCVendor advisory
  37. 2026-09-01 15:06 UTCEG score recompute
  38. 2026-09-01 15:06 UTCVendor advisory
  39. 2026-09-01 13:54 UTCEPSS rescore
  40. 2026-09-01 04:40 UTCEPSS rescore
  41. 2026-08-31 02:16 UTCEG score recompute
  42. 2026-08-30 19:17 UTCEPSS rescore
  43. 2026-08-30 02:03 UTCEG score recompute
  44. 2026-08-30 01:22 UTCEPSS rescore
  45. 2026-08-29 01:48 UTCEG score recompute
  46. 2026-08-28 21:42 UTCEPSS rescore
  47. 2026-08-27 21:12 UTCEG score recompute
  48. 2026-08-27 14:25 UTCEPSS rescore
  49. 2026-08-26 20:57 UTCEG score recompute
  50. 2026-08-26 14:46 UTCEPSS rescore
  51. 2026-08-25 20:42 UTCEG score recompute
  52. 2026-08-25 13:49 UTCEPSS rescore
  53. 2026-08-24 20:29 UTCEG score recompute
  54. 2026-08-23 08:05 UTCEG score recompute
  55. 2026-08-23 00:19 UTCEPSS rescore
  56. 2026-08-22 07:52 UTCEG score recompute
  57. 2026-08-21 23:49 UTCEPSS rescore
  58. 2026-08-21 07:39 UTCEG score recompute
  59. 2026-08-20 22:55 UTCEPSS rescore
  60. 2026-08-19 18:18 UTCEG score recompute
  61. 2026-08-19 18:04 UTCEG score recompute
  62. 2026-08-19 18:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-63652?
CVE-2026-63652 is a high vulnerability published on August 19, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsndserverrecvformats in channels/rdpsnd/server/rdpsndmain.c frees context->clientformats on a malformed Client Audio Formats PDU without clearing the owning pointer or numclientformats. An authenticated RDP client…
When was CVE-2026-63652 disclosed?
CVE-2026-63652 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63652 actively exploited?
CVE-2026-63652 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 72.2% of all scored CVEs.
What is the CVSS score of CVE-2026-63652?
CVE-2026-63652 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-63652?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63652, 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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