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CVE Record

CVE-2021-44971: Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0 Firmware V15.03.05.20_multi?...

Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0 Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on. an attacker can obtain sensitive information, and even combine it with authenticated command injection to implement RCE.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-44971 describes an authentication bypass in multiple Tenda devices. The public record says attackers may access sensitive information and could combine this with another authenticated command-injection issue to reach remote code execution. The source data does not provide a CVSS score, complete product list, or confirmed fix.

Executive priority

Prioritize identification and isolation of affected Tenda devices, especially internet-exposed routers. Business risk is elevated because authentication bypass on edge devices can expose sensitive information and may support broader compromise when combined with other flaws.

Technical view

The CVE record identifies authentication bypass affecting multiple Tenda firmware builds, including AC15V1.0 V15.03.05.20_multi and AC5V1.0 V15.03.06.48_multi. Metadata lacks CWE, CPE, and CVSS details. The stated impact is sensitive information disclosure, with possible RCE only when chained with a separate authenticated command-injection vulnerability.

Likely exposure

Exposure is most likely in environments running affected Tenda router firmware, especially the named AC15V1.0 and AC5V1.0 builds. Because the source says “and so on” without CPEs or a full matrix, asset inventory and firmware verification are necessary.

Exploitation context

The provided data does not show CISA KEV listing or confirmed active exploitation. A public GitHub reference exists, so technical details may be publicly accessible. The record describes potential chaining to RCE, but does not prove standalone code execution.

Researcher notes

Evidence is incomplete: no CVSS, CWE, CPE, full affected-version matrix, patch status, or exploit telemetry is provided. Treat the GitHub reference as the main technical source, but avoid assuming all Tenda models are affected without verification.

Mitigation direction

  • Check Tenda support guidance for fixed firmware or replacement advice.
  • Disable internet-facing router administration interfaces.
  • Restrict management access to trusted administrative networks only.
  • Replace unsupported affected devices if no vendor fix exists.
  • Monitor router configuration, DNS, and administrator changes.

Validation and detection

  • Inventory Tenda devices and record exact model and firmware versions.
  • Compare firmware against AC15V1.0 V15.03.05.20_multi and AC5V1.0 V15.03.06.48_multi.
  • Confirm management interfaces are not exposed to the internet.
  • Review logs and configuration history for unexpected administrative activity.
  • Track vendor or CVE updates for a complete affected-version list.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

Execution 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 lookup
description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-44971 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
3Timeline events
1ADP providers
2Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.