CVE-2022-23480Network attack vector

Unauthenticated memory corruption via device-list announcement

Published Dec 9, 2022 · Updated Apr 23, 2025

Buffer overflow in xrdp before 0.9.21 allows remote attackers to corrupt memory via an RDP client device-list announcement. The devredir_proc_client_devlist_announce_req() handler processes the announcement, but upstream has not disclosed which field overruns which buffer. No authentication or user interaction is required; successful exploitation can modify process memory or crash the service, with no reported confidentiality loss.

CVSS severity9.1
Critical
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in xrdp before 0.9.21 allows remote attackers to corrupt memory via an RDP client device-list announcement. The devredir_proc_client_devlist_announce_req() handler processes the announcement, but upstream has not disclosed which field overruns which buffer. No authentication or user interaction is required; successful exploitation can modify process memory or crash the service, with no reported confidentiality loss.

The record

CVE
CVE-2022-23480
Published
Dec 9, 2022
Updated
Apr 23, 2025
Vendor
neutrinolabs
Product
xrdp
Classifications
CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=< 0.9.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

neutrinolabs · xrdpversion=< 0.9.21

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

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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