CVE-2021-3186

MEDIUMNVD 5.45.4—Elevated

5.4

A Stored Cross-site scripting (XSS) vulnerability in /main.html Wifi Settings in Tenda AC5 AC1200 version V15.03.06.47_multi allows remote attackers to inject arbitrary web script or HTML via the Wifi Name parameter.

CVSS v3: 5.4
EG Score: 5.4(medium)
EPSS: 57.1%
KEV: Not listed

Published

January 26, 2021

Last Modified

July 7, 2025

References (4)

cve@mitrehttp://packetstormsecurity.com/files/161119/Tenda-AC5-AC1200-Wireless-Cross-Site-Scripting.html
cve@mitrehttps://www.hackingarticles.in/exploiting-stored-cross-site-scripting-at-tenda-ac5-ac1200/
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/161119/Tenda-AC5-AC1200-Wireless-Cross-Site-Scripting.html
af854a3a-2127-422b-91ae-364da2661108https://www.hackingarticles.in/exploiting-stored-cross-site-scripting-at-tenda-ac5-ac1200/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-79Cross-site Scripting (XSS)

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-29 13:42 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-49478
First seen Jan 26, 2021
Tenda AC5 AC1200 Wireless - 'WiFi Name & Password' Stored Cross Site Scripting
Open source ↗

Frequently asked(5)

What is CVE-2021-3186?

CVE-2021-3186 is a medium vulnerability published on January 26, 2021. A Stored Cross-site scripting (XSS) vulnerability in /main.html Wifi Settings in Tenda AC5 AC1200 version V15.03.06.47_multi allows remote attackers to inject arbitrary web script or HTML via the Wifi Name parameter.

When was CVE-2021-3186 disclosed?

CVE-2021-3186 was first published in the National Vulnerability Database on January 26, 2021, with the most recent update on July 7, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-3186 actively exploited?

CVE-2021-3186 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-3186?

CVE-2021-3186 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2021-3186?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3186, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-3186

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-3186?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)