How severe is CVE-2019-3663?

CVE-2019-3663 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-3663 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3663?

CVE-2019-3663 affects Mcafee Advanced Threat Defense. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3663?

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

When was CVE-2019-3663 published?

CVE-2019-3663 was published on 2019-11-14 and last updated on 2026-06-17.

CVE-2019-3663

CVE-2019-3663 is a critical-severity vulnerability in Mcafee Advanced Threat Defense with a CVSS 3.x base score of 9.8. 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-522.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 2.1
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Mcafee Advanced Threat Defense
Published: 2019-11-14
Last modified: 2026-06-17

Description

Unprotected Storage of Credentials vulnerability in McAfee Advanced Threat Defense (ATD) prior to 4.8 allows local attacker to gain access to the root password via accessing sensitive files on the system. This was originally published with a CVSS rating of High, further investigation has resulted in this being updated to Critical. The root password is common across all instances of ATD prior to 4.8. See the Security bulletin for further details

Frequently asked questions

What is CVE-2019-3663?: Unprotected Storage of Credentials vulnerability in McAfee Advanced Threat Defense (ATD) prior to 4.8 allows local attacker to gain access to the root password via accessing sensitive files on the system. This was originally published with a CVSS rating of High, further investigation has resulted in this being updated to Critical. The root password is common across all instances of ATD prior to 4.8. See the Security bulletin for further details
How severe is CVE-2019-3663?: CVE-2019-3663 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-3663 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3663?: CVE-2019-3663 affects Mcafee Advanced Threat Defense. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3663?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-3663 published?: CVE-2019-3663 was published on 2019-11-14 and last updated on 2026-06-17.

References

https://kc.mcafee.com/corporate/index?page=content&id=SB10304

Affected products (1)

cpe:2.3:a:mcafee:advanced_threat_defense:*:*:*:*:*:*:*:*

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