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CVE-2021-44971

33
FAUCET Score

CVE-2021-44971 describes a critical authentication bypass vulnerability affecting multiple Tenda devices, including AC15V1.0 and AC5V1.0 firmware versions. This flaw allows an unauthenticated attacker to gain sensitive information and, when combined with other vulnerabilities like authenticated command injection, achieve Remote Code Execution (RCE). With a CVSS score of 9.8 (CRITICAL), the vulnerability is easily exploitable over the network with low attack complexity and no user interaction required, leading to high impacts on confidentiality, integrity, and availability. While no public exploit intelligence (Metasploit, Nuclei, ExploitDB) or active exploitation (KEV) has been identified, and community discussion and media coverage are minimal, the high FAUCET Risk Score of 82/100 indicates significant potential risk.

Impacted Technologies

VendorProductVersion(s)CPE
15.03.05.20_multiCPE matchmatch criteria
cpe:2.3:o:tenda:ac15_firmware:15.03.05.20_multi:*:*:*:*:*:*:*
15.03.06.48_multiCPE matchmatch criteria
cpe:2.3:o:tenda:ac5_firmware:15.03.06.48_multi:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.08%
Probability of exploitation in next 30 days
EPSS Percentile
79.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0208 is in the 69th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / 21Gun5/my_cve/blob/main/tenda/bypass_auth.md
Broken Link