CVE-2023-22466Network attack vector

Remote named-pipe access via configuration flag reset

Published Jan 4, 2023 · Updated Mar 10, 2025

Improper initialization in affected Tokio releases allows remote authenticated users to access Windows named pipes through an SMB share. The ServerOptions::pipe_mode method overwrites the shared creation-mode bit field, clearing the default or explicitly enabled reject_remote_clients flag. Exploitation requires an application to call pipe_mode and expose the pipe path through SMB; access remains limited to that application's pipe interface.

CVSS severity5.4
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in affected Tokio releases allows remote authenticated users to access Windows named pipes through an SMB share. The ServerOptions::pipe_mode method overwrites the shared creation-mode bit field, clearing the default or explicitly enabled reject_remote_clients flag. Exploitation requires an application to call pipe_mode and expose the pipe path through SMB; access remains limited to that application's pipe interface.

The record

CVE
CVE-2023-22466
Published
Jan 4, 2023
Updated
Mar 10, 2025
Vendor
Tokio
Product
Tokio
Classifications
CWE-665
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 1.19.0, < 1.20.3
  2. Affected versionversion=>= 1.21.0, < 1.23.1
  3. Affected versionversion=>= 1.7.0, < 1.18.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tokio · Tokioversion=>= 1.19.0, < 1.20.3; version=>= 1.21.0, < 1.23.1; version=>= 1.7.0, < 1.18.4

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-665Improper Initialization

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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