Trade-state corruption via mistaken strncpy comparison
Published Aug 7, 2026 · Updated Aug 7, 2026
Business logic error in WonderTrader 0.9.0 through 0.9.9 allows remote attackers to misclassify queried trade offsets via FID_JYLB. TraderDD::queryTrades uses strncpy(buf, "1", 1) as a comparison; its non-null return makes every populated trade take the WOT_CLOSE branch instead of testing the field value. Exploitation requires crafted data to reach the authenticated broker-session trade-query response path; the bounded result is incorrect open-versus-close trade state, not code execution, disclosure, or service interruption.
Summary
What happened
Business logic error in WonderTrader 0.9.0 through 0.9.9 allows remote attackers to misclassify queried trade offsets via FID_JYLB. TraderDD::queryTrades uses strncpy(buf, "1", 1) as a comparison; its non-null return makes every populated trade take the WOT_CLOSE branch instead of testing the field value. Exploitation requires crafted data to reach the authenticated broker-session trade-query response path; the bounded result is incorrect open-versus-close trade state, not code execution, disclosure, or service interruption.
The record
- CVE
- CVE-2026-19208
- Published
- Aug 7, 2026
- Updated
- Aug 7, 2026
- Vendor
- WonderTrader
- Product
- WonderTrader
- Classifications
- CWE-841, CWE-840, T1565
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 7, 2026CVE publishedPublication date reported by the CVE source.
- Aug 7, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0.9.0
- Affected versionversion=0.9.1
- Affected versionversion=0.9.2
- Affected versionversion=0.9.3
- Affected versionversion=0.9.4
- Affected versionversion=0.9.5
- Affected versionversion=0.9.6
- Affected versionversion=0.9.7
- Affected versionversion=0.9.8
- Affected versionversion=0.9.9
What conditions does exploitation require?
What is affected?
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
- WonderTrader 0.9.9 Incorrect Comparison proof of conceptproof of concept · unverified
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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