Totolink devices A3100R v4.1.2cu.5050_B20200504, A830R v5.9c.4729_B20191112, and A720R…
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Totolink devices A3100R v4.1.2cu.5050_B20200504, A830R v5.9c.4729_B20191112, and A720R v4.1.5cu.470_B20200911 were discovered to contain a stack overflow in the function setNoticeCfg. This vulnerability allows attackers to cause a Denial of Service (DoS) via the IpTo parameter.
Why it matters now
EPSS 0.01175 67th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.470_b20200911:*:*:*:*:*:*:* | 4.1.5cu.470_b20200911 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a720r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:a830r_firmware:5.9c.4729_b20191112:*:*:*:*:*:*:* | 5.9c.4729_b20191112 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a830r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:a3100r_firmware:4.1.2cu.5050_b20200504:*:*:*:*:*:*:* | 4.1.2cu.5050_b20200504 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a3100r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
- cpe:2.3:o:totolink:a720r_firmware:4.1.5cu.470_b20200911:*:*:*:*:*:*:* Versions 4.1.5cu.470_b20200911 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a720r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:a830r_firmware:5.9c.4729_b20191112:*:*:*:*:*:*:* Versions 5.9c.4729_b20191112 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a830r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:a3100r_firmware:4.1.2cu.5050_b20200504:*:*:*:*:*:*:* Versions 4.1.2cu.5050_b20200504 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a3100r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-44246
- 2026-10-03 Alias added: GHSA-4555-c4vh-gv67
References
More TOTOLINK A3100r Firmware vulnerabilities
- TI-2025-20766 An issue in TOTOLINK A3100R V4.1.2cu.5247_B20211129 allows a remote attacker to execute… CVSS 3.1CRITICAL 9.8
- TI-2025-20692 TOTOLINK A950RG V4.1.2cu.5161_B20200903 was found to contain a pre-auth remote command… CVSS 3.1CRITICAL 9.8
- TI-2025-20691 TOTOLINK A830R V4.1.2cu.5182_B20201102 was found to contain a pre-auth remote command… CVSS 3.1CRITICAL 9.8
- TI-2025-20690 TOTOLINK A800R V4.1.2cu.5137_B20200730, A810R V4.1.2cu.5182_B20201026, A830R… CVSS 3.1CRITICAL 9.8
- TI-2024-28489 TOTOLINK A3100R V4.1.2cu.5050_B20200504 has a buffer overflow vulnerability in the… CVSS 3.1CRITICAL 9.8
- TI-2024-28488 TOTOLINK A3100R V4.1.2cu.5050_B20200504 has a buffer overflow vulnerability in the… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-44246 · CVE Program
- CVE-2021-44246 · NVD
- FIRST EPSS
- GHSA-4555-c4vh-gv67 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences