What is CVE-2021-44246?

CVE-2021-44246 is a high-severity vulnerability in Totolink A3100r. CVSS score: 7.5/10. Published 2022-02-04.

How severe is CVE-2021-44246?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-44246 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Totolink A3100r

CVE-2021-44246

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.

Published 2022-02-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Totolink A3100r
Totolink A3100r Firmware — versions 4.1.2cu.5050_b20200504
Totolink A720r
Totolink A720r Firmware — versions 4.1.5cu.470_b20200911
Totolink A830r
Totolink A830r Firmware — versions 5.9c.4729_b20191112

Public proof-of-concept exploits

References

github.com/pjqwudi/my_vuln/blob/main/totolink/vuln_2/2.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-44246?: CVE-2021-44246 is a high-severity vulnerability in Totolink A3100r. CVSS score: 7.5/10. Published 2022-02-04.
How severe is CVE-2021-44246?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-44246 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.