| Title | Tenda AC21 V16.03.08.16 Missing Critical Step in Authentication |
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| Description | Tenda AC21 V16.03.08.16 is susceptible to an Unauthenticated System Log Download vulnerability. This flaw stems from a design deficiency in the Web management interface where the /cgi-bin/DownloadLog and /cgi-bin/DownloadSyslog paths fail to implement any Authentication or Authorization checks when handling HTTP requests.
A remote attacker can bypass the login process entirely and induce the device to export sensitive system logs. These logs typically contain:
Internal IP addresses and network topology.
Device MAC addresses and connection records.
System error messages and debugging information.
Potential login attempt records (which may include usernames or failed password attempts). |
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| Source | ⚠️ https://github.com/master-abc/cve/issues/30 |
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| User | 942384053 (UID 94603) |
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| Submission | 01/27/2026 16:12 (3 months ago) |
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| Moderation | 02/07/2026 08:51 (11 days later) |
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| Status | Accepted |
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| VulDB entry | 344849 [Tenda AC21 16.03.08.16 Web Management Interface /cgi-bin/DownloadLog information disclosure] |
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| Points | 20 |
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