What is CVE-2020-11557?

CVE-2020-11557 is a high-severity vulnerability in Castlerock Snmpc Online, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.5/10. Published 2020-04-09.

How severe is CVE-2020-11557?

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

Vulnerability in Castlerock Snmpc Online

CVE-2020-11557

An issue was discovered in Castle Rock SNMPc Online 12.10.10 before 2020-01-28. It includes the username and password values in cleartext within each request's cookie value.

Published 2020-04-09 · 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:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Castlerock Snmpc Online

Weakness classification (CWE)

References

medium.com/tsscyber/noc-noc-whos-there-your-nms-is-pwned-1826174e0dee (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-11557?: CVE-2020-11557 is a high-severity vulnerability in Castlerock Snmpc Online, classified under Cleartext Transmission of Sensitive Information. CVSS score: 7.5/10. Published 2020-04-09.
How severe is CVE-2020-11557?: High severity. CVSS v3 base score is 7.5 out of 10.