Security readout for executives and security teams
Plain-English summary
CVE-2026-1149 affects Totolink LR350 routers running firmware 9.3.5u.6369_B20220309. An authenticated remote user can abuse a diagnostic configuration function to inject operating-system commands. Public exploit information is referenced, but the sources do not show confirmed active exploitation.
Executive priority
Prioritize review if Totolink LR350 routers are internet-facing, used in branch offices, or administered with shared credentials. The business risk is router compromise leading to network disruption or unauthorized access, but current sources do not confirm active exploitation.
Technical view
The issue is in /cgi-bin/cstecgi.cgi, function setDiagnosisCfg, within the POST request handler. Manipulating the ip argument can lead to command injection, mapped to CWE-74 and CWE-77. The CVSS v2 score is 6.5 with network access, low complexity, and single authentication required.
Likely exposure
Exposure is most likely where Totolink LR350 administrative interfaces are reachable by untrusted users or the internet, especially on the listed firmware version. Authentication is required per the provided CVSS vector, so weak or reused router credentials increase practical risk.
Exploitation context
The source bundle states the exploit is publicly available and might be used. CISA KEV status is false, and no provided source confirms active exploitation in the wild. Treat internet-exposed management interfaces as higher priority.
Researcher notes
Do not assume broader Totolink models or firmware are affected beyond the listed LR350 firmware. Remediation details are incomplete in the provided sources. Public exploit availability raises validation urgency, but authentication requirements shape realistic exposure.
Mitigation direction
- Identify Totolink LR350 devices and confirm firmware version.
- Check Totolink advisories or support channels for updated firmware or official mitigation.
- Disable remote administration if not required.
- Restrict router management access to trusted administrative networks only.
- Use strong, unique administrative credentials.
- Monitor for suspicious access to /cgi-bin/cstecgi.cgi and diagnostic configuration functions.
Validation and detection
- Inventory LR350 routers across managed networks.
- Verify whether firmware 9.3.5u.6369_B20220309 is present.
- Confirm management interfaces are not internet-accessible.
- Review access logs for unusual authenticated POST requests to cstecgi.cgi.
- Document any vendor firmware or configuration guidance applied.
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-2026-1149 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-341742 | Totolink LR350 POST Request cstecgi.cgi setDiagnosisCfg command injectionCVE reference · vdb-entry, technical-description
- VDB-341742 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference · signature, permissions-required
- Submit #735695 | TOTOLINK LR350 LR350 V9.3.5u.6369_B20220309 Command InjectionCVE reference · third-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-LR350-setDiagnosisCfg-2e453a41781f800d9ba9c6da80b55276?source=copy_linkCVE 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.