What is CVE-2025-28031?

CVE-2025-28031 is a medium-severity vulnerability in Totolink A810r Firmware, classified under Use of Hard-coded Password. CVSS score: 6.5/10. Published 2025-04-22.

How severe is CVE-2025-28031?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-28031 known to be exploited?

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

Vulnerability in Totolink A810r Firmware

CVE-2025-28031

TOTOLINK A810R V4.1.2cu.5182_B20201026 was discovered to contain a hardcoded password for the telnet service in product.ini.

Published 2025-04-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Totolink A810r Firmware — versions 4.1.2cu.5182_b20201026

Weakness classification (CWE)

CWE-259 — Use of Hard-coded Password

Public proof-of-concept exploits

Lunax0/CVE_

References

locrian-lightning-dc7.notion.site/Hard-code-Password-19f8e5e2b1a2803f864afbbc42… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-28031?: CVE-2025-28031 is a medium-severity vulnerability in Totolink A810r Firmware, classified under Use of Hard-coded Password. CVSS score: 6.5/10. Published 2025-04-22.
How severe is CVE-2025-28031?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-28031 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.