Unauthenticated NTP data disclosure via getNtpCfg
Published Aug 28, 2026 · Updated Aug 28, 2026
Incorrect access control in TOTOLINK T6 4.1.5cu.748_B20211015 allows remote attackers to read NTP configuration and current time data. The cstecgi.cgi dispatcher accepts an unauthenticated POST whose topicurl value selects getNtpCfg, then returns the handler's data without an authentication check. Network reachability to the management CGI is the only documented gate; the disclosed consequence is limited to NTP settings and clock data.
Summary
What happened
Incorrect access control in TOTOLINK T6 4.1.5cu.748_B20211015 allows remote attackers to read NTP configuration and current time data. The cstecgi.cgi dispatcher accepts an unauthenticated POST whose topicurl value selects getNtpCfg, then returns the handler's data without an authentication check. Network reachability to the management CGI is the only documented gate; the disclosed consequence is limited to NTP settings and clock data.
The record
- CVE
- CVE-2026-51643
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1210
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- getNtpCfg crafted POST requestproof of concept · unverified
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Technologies
Your stack
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