Security readout for executives and security teams
Plain-English summary
Some Tenda D151 and D301 routers can reportedly disclose their configuration file to anyone who can reach the device, without logging in. That file may include administrator credentials. This is a serious exposure risk for small-office or home-office networks if router management is reachable from untrusted networks.
Executive priority
Prioritize internet-exposed affected routers. Credential disclosure from a gateway device can enable network takeover, traffic manipulation, or broader compromise. Treat this as urgent where remote administration is enabled or exposure cannot be ruled out.
Technical view
CVE-2021-47802 is an unauthenticated configuration download issue in Tenda D151 and D301 routers, mapped to CWE-306. The supplied CVSS 4.0 score is 8.7. Public sources describe remote retrieval of router configuration data, including admin credentials, through a web endpoint without authentication.
Likely exposure
Exposure is most likely where affected Tenda D151 or D301 router web interfaces are reachable from the internet, guest networks, or other untrusted segments. The source bundle does not identify specific firmware versions, CPEs, or a vendor-fixed release.
Exploitation context
A public ExploitDB entry exists, so defenders should assume practical exploit knowledge is available. The CVE is not marked KEV in the provided data, and no cited source confirms active exploitation in the wild.
Researcher notes
Evidence confirms the vulnerability class, affected models, public exploit reference, and high CVSS score. Gaps remain: affected firmware versions, official vendor advisory details, fixed versions, and real-world exploitation evidence are not provided in the source bundle.
Mitigation direction
- Check Tenda guidance for affected firmware and any available updates.
- Disable remote management from the internet where possible.
- Restrict router administration to trusted internal management networks.
- Change router administrator credentials after remediation or suspected exposure.
- Replace devices if no supported firmware or vendor mitigation is available.
Validation and detection
- Inventory environments for Tenda D151 and D301 routers.
- Confirm whether management interfaces are exposed to untrusted networks.
- Review router and perimeter logs for unauthenticated configuration-download attempts.
- Verify firmware status against current Tenda or advisory information.
- Confirm administrative access is restricted after mitigation.
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-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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 lookupCVE-2021-47802 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
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49782CVE reference · exploit
- Tenda Official Vendor HomepageCVE reference · product
- VulnCheck Advisory: Tenda D151 & D301 - Configuration DownloadCVE reference · third-party-advisory
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.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.