CVE-2026-51670: n/a
Description
CVE-2026-51670 is a critical vulnerability in TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It involves incorrect access control in the getSlaveUpdate function, allowing unauthenticated attackers to query the slave upgrade status and manipulate upgrade bookkeeping by sending crafted POST requests to /cgi-bin/cstecgi.cgi.
CVSS v3.1
Score 9.8critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 arises from improper access control in the getSlaveUpdate function. An attacker without authentication can send specially crafted POST requests to the /cgi-bin/cstecgi.cgi endpoint to query the slave upgrade status and interfere with upgrade bookkeeping processes. The CVSS 3.1 score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Exploitation of this vulnerability allows unauthenticated remote attackers to access sensitive upgrade status information and potentially disrupt or manipulate the device's upgrade bookkeeping. This can lead to unauthorized control over upgrade processes, potentially compromising device integrity and availability.
Mitigation Recommendations
No patch or official fix information is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, restrict access to the affected endpoint and monitor for suspicious POST requests targeting /cgi-bin/cstecgi.cgi.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-537g-8cpm-mc3r
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-51670"]
Threat ID: 6a95bf04acd9273b496677a4
Added to database: 08/31/2026, 17:51:00 UTC
Last enriched: 09/07/2026, 22:37:34 UTC
Last updated: 10/14/2026, 18:48:21 UTC
Views: 71
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