CVE-2022-25226Public exploitNetwork attack vector

Unauthenticated remote code execution via SID bypass

Published Apr 18, 2022 · Updated Aug 3, 2024

Authentication bypass in ThinVNC 1.0b1 allows remote attackers to execute code via the unauthenticated web command interface. The /cmd?cmd=connect endpoint issues a valid SID without authentication, and subsequent start, keyboard, mouse, and clipboard commands control the Windows desktop. Any network access to the exposed service is sufficient; no account or user interaction is required, and successful control can run commands as the service context.

CVSS severity10.0
Critical
EPSS probability10.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in ThinVNC 1.0b1 allows remote attackers to execute code via the unauthenticated web command interface. The /cmd?cmd=connect endpoint issues a valid SID without authentication, and subsequent start, keyboard, mouse, and clipboard commands control the Windows desktop. Any network access to the exposed service is sufficient; no account or user interaction is required, and successful control can run commands as the service context.

The record

CVE
CVE-2022-25226
Published
Apr 18, 2022
Updated
Aug 3, 2024
Vendor
Cybele Software
Product
Thinfinity VNC
Classifications
CWE-287, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=1.0b1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cybele Software · Thinfinity VNCversion=1.0b1

Published CVSS scores

7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
10.0NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/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 exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1210Exploitation of Remote Services

Public exploit references

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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