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CVE-2026-73242— FreeRDP: Kerberos GSS Wrap-token `EC` field is unbounded, causing an out-of-bounds decrypt in `kerberos_DecryptMessage`

CVSS 8.3 · High

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-73242

Vulnerability Information
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Vulnerability Title
FreeRDP: Kerberos GSS Wrap-token `EC` field is unbounded, causing an out-of-bounds decrypt in `kerberos_DecryptMessage`
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.30.0, FreeRDP's winpr/libwinpr/sspi/Kerberos/kerberos.c kerberos_DecryptMessage function fails to bound the peer-controlled GSS Wrap-token EC field before using it with RRC in IOV pointer offsets, allowing a malicious RDP peer to trigger out-of-bounds reads and in-place writes during CredSSP/NLA Kerberos decryption. This issue is fixed in version 3.30.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
FreeRDPFreeRDP < 3.30.0 -

II. Public POCs for CVE-2026-73242

#POC DescriptionSource LinkShenlong Link
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Qwen3.6-35B-A3B · 10488 chars
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III. Intelligence Information for CVE-2026-73242

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Patches & Fixes for CVE-2026-73242 (2)

Vendor Advisories for CVE-2026-73242 (1)

Vendor Pages for CVE-2026-73242 (1)

Same Patch Batch · FreeRDP · 2026-08-11 · 4 CVEs total

CVE-2026-732418.3 HIGHFreeRDP: RDSTLS server authentication bypass: a credential-less Capabilities PDU is accept
CVE-2026-727457.5 HIGHFreeRDP before 3.30.0 Out-of-Bounds Read via Kerberos GSS Wrap-token EC
CVE-2026-727467.5 HIGHFreeRDP before 3.30.0 RDSTLS Server Authentication Bypass via PDU-type Confusion

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-122

V. Comments for CVE-2026-73242

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