Security readout for executives and security teams
Plain-English summary
CVE-2026-1689 affects Tenda HG10 firmware version US_HG7_HG9_HG10re_300001138_en_xpon. A flaw in the login interface can allow remote command injection through the Host argument. Public exploit information exists. There is no cited evidence of active exploitation or a confirmed vendor patch in the provided sources.
Executive priority
Treat as high priority for network-edge environments. Public exploit information plus remote unauthenticated reachability increases business risk. Prioritize finding exposed devices, removing WAN management access, and confirming whether vendor remediation exists.
Technical view
VulDB describes command injection in /boaform/admin/formLogin, specifically checkUserFromLanOrWan, via manipulation of the Host argument. The issue is remotely reachable, requires no authentication under the listed CVSS v2 vector, and impacts confidentiality, integrity, and availability partially. CWE mappings include CWE-74 and CWE-77.
Likely exposure
Highest exposure is Tenda HG10 devices running the listed firmware with the management/login interface reachable from untrusted networks, especially the internet or shared WAN segments. Internal-only devices still matter if attackers gain local network access.
Exploitation context
The source bundle states the exploit is public and may be used, with a GitHub PoC reference. CISA KEV status is false, and no provided source confirms active exploitation in the wild.
Researcher notes
Evidence is centered on VulDB and a public GitHub PoC reference. The bundle does not include a vendor advisory, patch version, or proof of active exploitation. Avoid assuming impact beyond the listed Tenda HG10 firmware unless additional vendor evidence appears.
Mitigation direction
- Check Tenda guidance for updated firmware or official mitigation.
- Disable internet-facing access to the device management interface.
- Restrict administrative access to trusted management networks only.
- Place affected devices behind firewall rules or VPN access controls.
- Consider replacement if no vendor-supported fix is available.
Validation and detection
- Inventory Tenda HG10 devices and record firmware versions.
- Identify devices running US_HG7_HG9_HG10re_300001138_en_xpon.
- Verify whether login interfaces are reachable from WAN or untrusted networks.
- Review logs for unusual login-interface requests or unexpected device behavior.
- Track vendor and CVE sources for patch or advisory 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-2026-1689 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
- High
- CVSS
- 7.5 (2.0)
- Known Exploited
- No
- Published
Vector: AV:N/AC:L/Au:N/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:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR106.4Primary CVE scoreVulnerability scoring details
Base CVSS 2.0 score
7.5HighVector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
Source materials
- CVE List V5 sourceCVE List V5
- VDB-343483 | Tenda HG10 Login formLogin checkUserFromLanOrWan command injectionCVE reference · vdb-entry, technical-description
- VDB-343483 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference · signature, permissions-required
- Submit #741411 | Tenda HG10 US_HG7_HG9_HG10re_300001138_en_xpon Command InjectionCVE reference · third-party-advisory
- https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/HG10/formLogin-Host-command.mdCVE reference · related, exploit
- https://www.tenda.com.cn/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.