CVE-2026-72746

✕ Withdrawn — historical dataHIGHPre-NVD 7.5Elevated
7.5CVSS
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

FreeRDP before 3.30.0 contains a server-side authentication bypass in the RDSTLS handshake. When a server is configured with RdstlsSecurity = TRUE, the handshake dispatches inbound PDUs based solely on the attacker-supplied wire pduType without verifying that the received PDU is the one required at the current step. Because the rdpRdstls object is calloc-zeroed, its resultCode defaults to 0 (RDSTLS_RESULT_SUCCESS). An unauthenticated remote client can send a Capabilities PDU instead of the required Authentication Request PDU; rdstls_process_capabilities() returns success without ever setting resultCode, so the server responds with an AUTHRSP carrying resultCode SUCCESS and treats the session as authenticated without evaluating any password, redirection GUID, or auto-reconnect cookie. This affects the released FreeRDP 3.x series (e.g., 3.27.1) and master HEAD; at the time of the advisory no patched version was available.

CVSS v3
7.5
EchelonGraph score
Not yet assessedThis CVE record was withdrawn by its numbering authority, so there is no vulnerability to rate.
EG Score
—
EG Risk
—
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 11, 2026

Advisory Details (3)

Auto-updated Aug 11, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

FreeRDP before 3.30.0 RDSTLS Server Authentication Bypass via PDU-type Confusion | Advisories | VulnCheck

https://www.vulncheck.com/advisories/freerdp-before-rdstls-server-authentication-bypass-via-pdu-type-confusion
github_commit

commit b05a9510787c (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit b05a9510787c — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/b05a9510787c83c87ffc5fa8d7cc9f06ed971695
github Patch Available🟡 PoC Available

RDSTLS server authentication bypass: a credential-less Capabilities PDU is accepted at the auth step (fail-open `resultCode`) · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rqgv-grx4-xm6x

Vendor Advisories for CVE-2026-72746(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 3× in last 7d / 13× 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. 2026-08-21 05:46 UTCGHSA enrichment
  2. 2026-08-18 09:54 UTCGHSA enrichment
  3. 2026-08-15 14:02 UTCGHSA enrichment
  4. 2026-08-12 18:10 UTCEG score recompute▼ 7.50
  5. 2026-08-12 18:10 UTCGHSA enrichment
  6. 2026-08-12 13:51 UTCEPSS rescore
  7. 2026-08-12 05:23 UTCGHSA enrichment
  8. 2026-08-11 16:36 UTCEG score recompute
  9. 2026-08-11 16:36 UTCGHSA enrichment
  10. 2026-08-11 15:22 UTCEG score recompute
  11. 2026-08-11 13:25 UTCEG score recompute
  12. 2026-08-11 12:22 UTCEG score recompute
  13. 2026-08-11 12:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-72746?
CVE-2026-72746 is a high vulnerability published on August 11, 2026. FreeRDP before 3.30.0 contains a server-side authentication bypass in the RDSTLS handshake. When a server is configured with RdstlsSecurity = TRUE, the handshake dispatches inbound PDUs based solely on the attacker-supplied wire pduType without verifying that the received PDU is the one required at…
When was CVE-2026-72746 disclosed?
CVE-2026-72746 was first published in the National Vulnerability Database on August 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72746 actively exploited?
CVE-2026-72746 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 64.0% of all scored CVEs.
What is the CVSS score of CVE-2026-72746?
CVE-2026-72746 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-72746?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72746, 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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