CVE-2022-41877Network attack vector

Client memory disclosure via unchecked path length

Published Nov 16, 2022 · Updated Nov 3, 2025

Out-of-bounds read in FreeRDP before 2.9.0 allows remote attackers controlling an RDP server to receive client memory via drive redirection. drive_process_irp_query_directory reads a server-supplied PathLength, advances the input stream, and takes a path pointer without first verifying that PathLength bytes remain. Exploitation requires the client to connect to the server with drive redirection enabled, after which out-of-bounds data can be returned over the same RDP session.

CVSS severity4.6
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in FreeRDP before 2.9.0 allows remote attackers controlling an RDP server to receive client memory via drive redirection. drive_process_irp_query_directory reads a server-supplied PathLength, advances the input stream, and takes a path pointer without first verifying that PathLength bytes remain. Exploitation requires the client to connect to the server with drive redirection enabled, after which out-of-bounds data can be returned over the same RDP session.

The record

CVE
CVE-2022-41877
Published
Nov 16, 2022
Updated
Nov 3, 2025
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-1284, T1041
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreeRDP · FreeRDPversion=< 2.9.0

Published CVSS scores

4.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
4.6GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1041Exfiltration Over C2 Channel

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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