CVE-2021-3186Public exploitNetwork attack vector

Stored XSS via unsanitized Wi-Fi name

Published Jan 24, 2021 · Updated Aug 3, 2024

Stored XSS in the Wi-Fi settings page of Tenda AC5 AC1200 15.03.06.47_multi allows remote authenticated users to run browser scripts. The interface stores a script-bearing Wi-Fi Name value and later inserts it into /main.html without neutralization, causing execution when the dashboard loads. Access to Wi-Fi settings and a subsequent dashboard visit are required; the script runs in the router interface's browser origin and can read or alter session-accessible data.

CVSS severity5.4
Medium
EPSS probability2.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in the Wi-Fi settings page of Tenda AC5 AC1200 15.03.06.47_multi allows remote authenticated users to run browser scripts. The interface stores a script-bearing Wi-Fi Name value and later inserts it into /main.html without neutralization, causing execution when the dashboard loads. Access to Wi-Fi settings and a subsequent dashboard visit are required; the script runs in the router interface's browser origin and can read or alter session-accessible data.

The record

CVE
CVE-2021-3186
Published
Jan 24, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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