How severe is CVE-2016-3648?

CVE-2016-3648 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-3648 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-3648?

CVE-2016-3648 affects Symantec Endpoint Protection Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-3648?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-3648 published?

CVE-2016-3648 was published on 2016-06-30 and last updated on 2026-06-17.

CVE-2016-3648

CVE-2016-3648 is a high-severity vulnerability in Symantec Endpoint Protection Manager with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 4.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Symantec Endpoint Protection Manager
Published: 2016-06-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2016-3648?: 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.
How severe is CVE-2016-3648?: CVE-2016-3648 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-3648 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-3648?: CVE-2016-3648 affects Symantec Endpoint Protection Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-3648?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-3648 published?: CVE-2016-3648 was published on 2016-06-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:symantec:endpoint_protection_manager:*:mp4:*:*:*:*:*:*

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