CVE-2021-44971Public exploitNetwork attack vector

Unauthenticated data access via logo-path substring

Published Jan 28, 2022 · Updated Jul 9, 2026

Authentication bypass in Tenda AC15 V1.0 15.03.05.20_multi and AC5 V1.0 15.03.06.48_multi allows remote attackers to access protected data. The web interface treats any request URL containing img/main-logo.png as exempt from authentication, even when its session cookie is invalid. Network access to the management interface is sufficient; the bypass exposes protected information and can supply access for separate authenticated command-injection paths.

CVSS severity9.8
Critical
EPSS probability2.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Tenda AC15 V1.0 15.03.05.20_multi and AC5 V1.0 15.03.06.48_multi allows remote attackers to access protected data. The web interface treats any request URL containing img/main-logo.png as exempt from authentication, even when its session cookie is invalid. Network access to the management interface is sufficient; the bypass exposes protected information and can supply access for separate authenticated command-injection paths.

The record

CVE
CVE-2021-44971
Published
Jan 28, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, CWE-697, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-697Incorrect Comparison
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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