HOMEVULNERABILITIESCVE-2021-44971
CRITICAL

CVE-2021-44971

CWE-697Published: January 28, 2022· Updated: Jul 9, 2026

9.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-44971 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

tenda4 product(s)
ac15 firmwareac15ac5 firmwareac5
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
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All References (2)

Quick Facts

CVE IDCVE-2021-44971
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-697
CISA KEVNo
Affected1 vendor(s)
PublishedJan 28, 2022

Related CVEs (CWE-697)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2021-44971 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.