Security readout for executives and security teams
Plain-English summary
CVE-2026-1601 affects Totolink A7000R firmware 4.1cu.4154. A flaw in a router web CGI function can allow command injection through a filename parameter. It is remotely reachable and a public proof of concept is referenced, but the available data indicates authentication is required and there is no KEV-listed active exploitation.
Executive priority
Treat as a near-term router exposure issue, not an enterprise-wide emergency. Prioritize sites using affected Totolink hardware with exposed management access. Public PoC availability increases urgency, while authentication requirement and lack of confirmed active exploitation keep this below critical priority.
Technical view
The vulnerability is reported in /cgi-bin/cstecgi.cgi, function setUploadUserData, where manipulation of the FileName argument can lead to command injection. VulDB maps it to CWE-74 and CWE-77. CVSS v2 is 6.5 with AV:N/AC:L/Au:S, indicating network access, low complexity, and required authentication.
Likely exposure
Exposure is likely limited to environments using Totolink A7000R firmware 4.1cu.4154, especially where the management interface is reachable by untrusted users or weakly controlled accounts. The provided CPE is broad, but the described affected version is specific.
Exploitation context
A public exploit/PoC is linked in the source bundle, so reproduction risk is elevated. Sources do not show CISA KEV listing or confirmed active exploitation. The CVSS vector and VulDB CTI reference indicate permissions or authentication are required.
Researcher notes
The strongest evidence comes from CVE/VulDB metadata and a linked public PoC repository. No vendor advisory, fixed version, or official mitigation is present in the supplied sources. Avoid assuming other Totolink models or firmware versions are affected without additional confirmation.
Mitigation direction
- Identify any Totolink A7000R devices and confirm firmware version.
- Check Totolink support channels for updated firmware or vendor guidance.
- Restrict router administration access to trusted networks only.
- Disable remote management if it is not required.
- Review and tighten administrator account access.
Validation and detection
- Inventory Totolink A7000R devices across sites and unmanaged networks.
- Record current firmware versions and compare against 4.1cu.4154.
- Confirm whether administrative interfaces are internet-exposed or broadly reachable.
- Review logs for unusual administrative activity or configuration changes.
- Monitor CVE, VulDB, and Totolink pages for fix updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-74: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-1601 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (2.0)
- Known Exploited
- No
- Published
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR86.4Primary CVE scoreVulnerability scoring details
Base CVSS 2.0 score
6.5MediumVector: AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
Source materials
- CVE List V5 sourceCVE List V5
- VDB-343373 | Totolink A7000R cstecgi.cgi setUploadUserData command injectionCVE reference · vdb-entry, technical-description
- VDB-343373 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference · signature, permissions-required
- Submit #740760 | TOTOLINK A7000R V4.1cu.4154 Command InjectionCVE reference · third-party-advisory
- https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/03_RCE_setUploadUserData_RCE.mdCVE reference · exploit
- https://www.totolink.net/CVE reference · product
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.