Is CVE-2016-3648 in the CISA KEV catalog?

No. CVE-2016-3648 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-3648?

CVE-2016-3648 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2016-3648?

CVE-2016-3648 has an EPSS score of 2.33% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2016-3648?

No published fix for CVE-2016-3648 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2016-3648

HIGHEPSS 81th pctl

8.8

CVSS v3

NVD

Description

Symantec Endpoint Protection Manager (SEPM) 12.1 before RU6 MP5 allows remote authenticated users to bypass the Authentication Lock protection mechanism, and conduct brute-force password-guessing attacks against management-console accounts, by entering data into the authorization window.

CWE-200Information Exposure CWE-254

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.33%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Vendor Advisory1

symantec.com

Other references2

Embed a live status badge for CVE-2016-3648

Markdown

[![CVE-2016-3648](https://tridentstack.com/cve/badge/CVE-2016-3648.svg)](https://tridentstack.com/cve/CVE-2016-3648)

HTML

<a href="https://tridentstack.com/cve/CVE-2016-3648"><img src="https://tridentstack.com/cve/badge/CVE-2016-3648.svg" alt="CVE-2016-3648"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.