CVE-2026-33952
published 2026-03-30CVE-2026-33952: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a…
PriorityP433medium6.5CVSS 3.1
AVNACLPRNUIRSUCNINAH
EPSS
0.27%
19.1th percentile
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | freerdp2 | < freerdp3 3.24.2+dfsg-1 (forky) | freerdp3 3.24.2+dfsg-1 (forky) |
| debian | freerdp3 | < freerdp3 3.24.2+dfsg-1 (forky) | freerdp3 3.24.2+dfsg-1 (forky) |
| freerdp | freerdp | < 3.24.2 | 3.24.2 |
| ubuntu | freerdp3 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvdv4.06.0MEDIUMCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
osv6.0MEDIUM
vendor_debian6.0MEDIUM
vendor_redhat6.0MEDIUM
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Ubuntu
FreeRDP vulnerabilities
vendor_ubuntu·2026-07-20
CVE-2026-33995 FreeRDP vulnerabilities
Title: FreeRDP vulnerabilities
Summary: Several security issues were fixed in FreeRDP.
It was discovered that FreeRDP contained multiple security issues. An
attacker could possibly use these issues to obtain sensitive information,
cause FreeRDP to crash, resulting in a denial of service, or execute
arbitrary code.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.
Red Hat
FreeRDP: FreeRDP: Denial of Service via unvalidated authentication length field
vendor_redhat·2026-03-30·CVSS 6.0
CVE-2026-33952 [MEDIUM] CWE-130 FreeRDP: FreeRDP: Denial of Service via unvalidated authentication length field
FreeRDP: FreeRDP: Denial of Service via unvalidated authentication length field
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.
A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP). A remote attacker, by operating a malicious RDP Gateway, can exploit an u
Debian
CVE-2026-33952: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
vendor_debian·2026·CVSS 6.0
CVE-2026-33952 [MEDIUM] CVE-2026-33952: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.
Scope: local
bookworm: open
bullseye: open
OSV
CVE-2026-33952: FreeRDP is a free implementation of the Remote Desktop Protocol
osv·2026-03-30·CVSS 6.0
CVE-2026-33952 [MEDIUM] CVE-2026-33952: FreeRDP is a free implementation of the Remote Desktop Protocol
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-33952 FreeRDP: FreeRDP: Denial of Service via unvalidated authentication length field
bugzilla·2026-03-30·CVSS 6.5
CVE-2026-33952 [MEDIUM] CVE-2026-33952 FreeRDP: FreeRDP: Denial of Service via unvalidated authentication length field
CVE-2026-33952 FreeRDP: FreeRDP: Denial of Service via unvalidated authentication length field
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.
Bugzilla
CVE-2026-33952 freerdp2: FreeRDP: Denial of Service via unvalidated authentication length field [fedora-all]
bugzilla·2026-03-30·CVSS 6.5
CVE-2026-33952 [MEDIUM] CVE-2026-33952 freerdp2: FreeRDP: Denial of Service via unvalidated authentication length field [fedora-all]
CVE-2026-33952 freerdp2: FreeRDP: Denial of Service via unvalidated authentication length field [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.
Wiz
CVE-2026-33952 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 4.3
CVE-2026-33952 [MEDIUM] CVE-2026-33952 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-33952 :
NixOS vulnerability analysis and mitigation
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, an unvalidated auth_length field read from the network triggers a WINPR_ASSERT() failure in rts_read_auth_verifier_no_checks(), causing any FreeRDP client connecting through a malicious RDP Gateway to crash with SIGABRT. This is a pre-authentication denial of service affecting all FreeRDP clients using RPC-over-HTTP gateway transport. The assertion is active in default release builds (WITH_VERBOSE_WINPR_ASSERT=ON). This issue has been patched in version 3.24.2.
Source : NVD
## 6
Score
Published March 30, 2026
Severity MEDIUM
CNA Score 6.0
Affected Technologies
NixOS
Wolfi
Has Public Exploit Yes
Has CISA KEV Exploit No
CISA
2026-03-30
Published