Unauthenticated user enumeration via divergent login errors
Published Apr 13, 2022 · Updated Jul 9, 2026
User enumeration in EasyIO CPT Graphics 0.8 allows remote attackers to identify valid application usernames over the network. The login workflow returns an explicit “can not find user” error for an unknown name but no equivalent error for a valid name, creating a response oracle. No authentication or user interaction is required, and the disclosed account names can support subsequent credential attacks without exposing passwords directly.
Summary
What happened
User enumeration in EasyIO CPT Graphics 0.8 allows remote attackers to identify valid application usernames over the network. The login workflow returns an explicit “can not find user” error for an unknown name but no equivalent error for a valid name, creating a response oracle. No authentication or user interaction is required, and the disclosed account names can support subsequent credential attacks without exposing passwords directly.
The record
- CVE
- CVE-2022-26643
- Published
- Apr 13, 2022
- Updated
- Jul 9, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1087
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 13, 2022CVE publishedPublication date reported by the CVE source.
- Jul 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Weakness, pattern, technique
Public exploit references
- CVE-2022-26643 username-enumeration reproduction stepsproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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