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Vulnerability record · CVE-2021-46009 · published 30 March 2022

CVE-2021-46009: Totolink a3100r firmware missing authentication for critical function vulnerability

TTotolink · A3100r Firmware

In Totolink A3100R V5.9c.4577, multiple pages can be read by curl or Burp Suite without authentication. Additionally, admin configurations can be set without cookies.

9.8 CVSS 3.1 Critical EPSS 13% · top 3.9% CWE-306 · Missing authentication for critical function
9.8CVSS 3.1 base score, v2 10.0
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
9 Jul 2026Last modified by NVD

Description

In Totolink A3100R V5.9c.4577, multiple pages can be read by curl or Burp Suite without authentication. Additionally, admin configurations can be set without cookies.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://hackmd.io/-riYp6Q-ReCx-dKKWFBTLg ExploitThird Party Advisory
https://hackmd.io/-riYp6Q-ReCx-dKKWFBTLg ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-45788Totolink a3100r firmware out-of-bounds write vulnerabilityTOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow via the comment parameter in setMacFilterRules.EPSS 0.79%9.8CVE-2025-45789Totolink a3100r firmware out-of-bounds write vulnerabilityTOTOLINK A3100R V5.9c.1527 is vulnerable to buffer overflow via the urlKeyword parameter in setParentalRules.EPSS 0.79%9.8CVE-2025-45790Totolink a3100r firmware out-of-bounds write vulnerabilityTOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow via the priority parameter in the setMacQos interface of /lib/cste_modules/firewall.so.EPSS 0.79%9.8CVE-2025-45787Totolink a3100r firmware out-of-bounds write vulnerabilityTOTOLINK A3100R V5.9c.1527 is vulnerable to Buffer Overflow viathe comment parameter in setIpPortFilterRules.EPSS 0.79%9.8CVE-2025-28035Totolink a830r firmware os command injection vulnerabilityTOTOLINK A830R V4.1.2cu.5182_B20201102 was found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through th…EPSS 1.3%9.8CVE-2025-28036Totolink a950rg firmware os command injection vulnerabilityTOTOLINK A950RG V4.1.2cu.5161_B20200903 was found to contain a pre-auth remote command execution vulnerability in the setNoticeCfg function through t…EPSS 1.3%9.8CVE-2025-28034Totolink a800r firmware os command injection vulnerabilityTOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R V4.1.2cu.5182_B20201102, A950RG V4.1.2cu.5161_B20200903, A3000RU V5.9c.5…EPSS 1.3%9.8CVE-2025-28256Totolink a3100r firmware os command injection vulnerabilityAn issue in TOTOLINK A3100R V4.1.2cu.5247_B20211129 allows a remote attacker to execute arbitrary code via the setWebWlanIdx of the file /lib/cste_mo…EPSS 0.95%

Source: NIST National Vulnerability Database (record CVE-2021-46009), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.