What is CVE-2022-46637?

CVE-2022-46637 is a critical-severity vulnerability in Prolink2u Prs1841, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2023-02-21.

How severe is CVE-2022-46637?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Prolink2u Prs1841

CVE-2022-46637

Prolink router PRS1841 was discovered to contain hardcoded credentials for its Telnet and FTP services.

Published 2023-02-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Prolink2u Prs1841
Prolink2u Prs1841 Firmware — versions u_v2

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

0xsp.com/security research development srd/backdoor-discovered-in-pldt-home-fi… (Exploit, Third Party Advisory)
prolink2u.com/product/prs1841/ (Product, Vendor Advisory)
packetstormsecurity.com/files/170342/ProLink-PRS1841-Backdoor-Account.html (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2022-46637?: CVE-2022-46637 is a critical-severity vulnerability in Prolink2u Prs1841, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2023-02-21.
How severe is CVE-2022-46637?: Critical severity. CVSS v3 base score is 9.8 out of 10.