CVE-2026-73241· NVD / CVE Program· CNA GitHub_M

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

Noroxi assessment

Priority: Monitor (action score 33/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.46% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: FreeRDP FreeRDP 3.30.0.

Low priority for now. Upgrade to FreeRDP FreeRDP 3.30.0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.30.0, FreeRDP server-side RDSTLS in libfreerdp/core/rdstls.c accepts an attacker-supplied RDSTLS_TYPE_CAPABILITIES PDU while rdstls_server_authenticate is waiting for RDSTLS_TYPE_AUTHREQ, leaving resultCode at RDSTLS_RESULT_SUCCESS and allowing a remote unauthenticated client to bypass the RedirectionGuid, username, domain, or password checks. This issue is fixed in version 3.30.0.

HighCVSS 8.3 · v4.0—No exploit Fix available

Published: Aug 11, 2026
Updated: Sep 25, 2026
EPSS: 0.4% · 39th percentile
CWE: CWE-287

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 33 / 40 · 8.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 8.3; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
freerdp	freerdp	cpe:2.3:a:freerdp:freerdp

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

freerdp freerdpbefore 3.30.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

FreeRDP FreeRDP
- < 3.30.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
AlmaLinux:10	freerdp	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
AlmaLinux:10	freerdp-devel	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
AlmaLinux:10	freerdp-libs	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
AlmaLinux:10	freerdp-server	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
AlmaLinux:10	libwinpr	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
AlmaLinux:10	libwinpr-devel	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
Debian:12	freerdp2	from 0	—
Debian:13	freerdp3	from 0	—
Debian:14	freerdp3	before 3.30.0+dfsg-1	3.30.0+dfsg-1
Red Hat:enterprise_linux_eus:10.0	freerdp	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	freerdp-debuginfo	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	freerdp-debugsource	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	freerdp-devel	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	freerdp-libs	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	freerdp-libs-debuginfo	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	freerdp-server	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	freerdp-server-debuginfo	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	libwinpr	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	libwinpr-debuginfo	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux_eus:10.0	libwinpr-devel	before 2:3.10.3-3.el10_0.16	2:3.10.3-3.el10_0.16
Red Hat:enterprise_linux:10.2	freerdp	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
Red Hat:enterprise_linux:10.2	freerdp-debuginfo	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
Red Hat:enterprise_linux:10.2	freerdp-debugsource	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10
Red Hat:enterprise_linux:10.2	freerdp-devel	before 2:3.10.3-12.el10_2.10	2:3.10.3-12.el10_2.10

Same product

freerdp: all records

Other highest-scoring records for the same primary product.

CVE-2018-8787FreeRDP prior to version 2.0.0-rc4 contains an Integer Overflow that leads to a Heap-Based Buffer Overflow in function gdi_Bitmap_Decompress
42Plan
CVE-2018-8788FreeRDP prior to version 2.0.0-rc4 contains an Out-Of-Bounds Write of up to 4 bytes in function nsc_rle_decode() that results in a memory co
41Plan
CVE-2018-8786FreeRDP prior to version 2.0.0-rc4 contains an Integer Truncation that leads to a Heap-Based Buffer Overflow in function update_read_bitmap_
41Plan

Published before and after this one in the same product

← EarlierCVE-2026-68579Aug 2, 2026 · FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read
34Monitor
← EarlierCVE-2026-68580Aug 2, 2026 · FreeRDP before 3.29.0 Integer Overflow via Audio Input Channel
30Monitor
Later →CVE-2026-73242Aug 11, 2026 · FreeRDP: Kerberos GSS Wrap-token `EC` field is unbounded, causing an out-of-bounds decrypt in `kerberos_DecryptMessage`
33Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
FreeRDP FreeRDP	3.30.0 · description	Vendor (CNA)
almalinux:freerdp	2:3.10.3-12.el10_2.10 · AlmaLinux:10	Package registry (OSV)
almalinux:freerdp-devel	2:3.10.3-12.el10_2.10 · AlmaLinux:10	Package registry (OSV)
almalinux:freerdp-libs	2:3.10.3-12.el10_2.10 · AlmaLinux:10	Package registry (OSV)
almalinux:freerdp-server	2:3.10.3-12.el10_2.10 · AlmaLinux:10	Package registry (OSV)
almalinux:libwinpr	2:3.10.3-12.el10_2.10 · AlmaLinux:10	Package registry (OSV)
almalinux:libwinpr-devel	2:3.10.3-12.el10_2.10 · AlmaLinux:10	Package registry (OSV)
debian:freerdp3	3.30.0+dfsg-1 · Debian:14	Package registry (OSV)
red hat:freerdp	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:freerdp-debuginfo	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:freerdp-debugsource	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:freerdp-devel	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:freerdp-libs	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:freerdp-libs-debuginfo	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:freerdp-server	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:freerdp-server-debuginfo	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:libwinpr	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:libwinpr-debuginfo	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:libwinpr-devel	2:3.10.3-12.el10_2.10 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
rocky linux:freerdp	2:3.10.3-12.el10_2.10 · Rocky Linux:10	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/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

nvd-secondary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1app.use("/admin", requireSession, adminRouter);
2

3// Route added later skips the middleware
4app.post("/admin-api/config", updateConfig);

Fixed

1const admin = express.Router();
2admin.use(requireSession, requireRole("admin"));
3

4admin.post("/config", updateConfig);
5app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/FreeRDP/FreeRDP/commit/b05a9510787c83c87ffc5fa8d7cc9f06ed971695

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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