What is CVE-2024-31809?

CVE-2024-31809 is a high-severity vulnerability in Totolink Ex200, classified under CWE-75. CVSS score: 8.8/10. Published 2024-04-08.

How severe is CVE-2024-31809?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2024-31809 known to be exploited?

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

Vulnerability in Totolink Ex200

CVE-2024-31809

TOTOLINK EX200 V4.0.3c.7646_B20201211 was discovered to contain a remote code execution (RCE) vulnerability via the FileName parameter in the setUpgradeFW function.

Published 2024-04-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Totolink Ex200
Totolink Ex200 Firmware — versions 4.0.3c.7646_b20201211

Weakness classification (CWE)

CWE-75

Public proof-of-concept exploits

References

github.com/4hsien/CVE-vulns/blob/main/TOTOLINK/EX200/CI_4_setUpgradeFW/CI.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-31809?: CVE-2024-31809 is a high-severity vulnerability in Totolink Ex200, classified under CWE-75. CVSS score: 8.8/10. Published 2024-04-08.
How severe is CVE-2024-31809?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2024-31809 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.