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Vulnerabilities

Vulnerability · CVE-2025-3664

A vulnerability, which was classified as critical, was found in TOTOLINK A3700R 9.1.2u.5822_B20200513.

Published Apr 16, 2025 · catalog updated Apr 16, 2025 · Totolink A3700R

Check if you run it

No confirmed exploitation is on record for CVE-2025-3664. EPSS is 0.61%. Act only if a listed version of Totolink A3700R is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.61%
Remediation
Vendor / distro source
Affected products
vendor Totolink A3700R 9.1.2u.5822_B20200513

A vulnerability, which was classified as critical, was found in TOTOLINK A3700R 9.1.2u.5822_B20200513. Affected is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Totolink A3700R 9.1.2u.5822_B202005139.1.2u.5822_B20200513

How to fix CVE-2025-3664

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-3664. EPSS is 0.61%. Act only if a listed version of Totolink A3700R is installed.

Which versions are affected?

Compare what you have installed with Totolink A3700R 9.1.2u.5822_B20200513 9.1.2u.5822_B20200513. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.61%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 16, 2025 · EUVD

    Detected

    A vulnerability, which was classified as critical, was found in TOTOLINK A3700R 9.1.2u.5822_B20200513. Affected is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but d

  2. Apr 16, 2025 · EUVD

    Updated

    A vulnerability, which was classified as critical, was found in TOTOLINK A3700R 9.1.2u.5822_B20200513. Affected is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but d

Sources

  • CVE.orgVulnerability recordCVE-2025-3664

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-3664

    30-day exploitation probability 0.6%

    first.org
  • EUVDVulnerability recordEUVD-2025-11350

    A vulnerability, which was classified as critical, was found in TOTOLINK A3700R 9.1.2u.5822_B20200513. Affected is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls. It is possible to launch the attack remotely.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.