How severe is CVE-2021-41019?

CVE-2021-41019 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-41019 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41019?

CVE-2021-41019 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-41019?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-41019 published?

CVE-2021-41019 was published on 2021-11-02 and last updated on 2026-06-17.

CVE-2021-41019

CVE-2021-41019 is a low-severity vulnerability in Fortinet Fortios with a CVSS 3.x base score of 3.5. 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-295.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Fortinet Fortios
Published: 2021-11-02
Last modified: 2026-06-17

Description

An improper validation of certificate with host mismatch [CWE-297] vulnerability in FortiOS versions 6.4.6 and below may allow the connection to a malicious LDAP server via options in GUI, leading to disclosure of sensitive information, such as AD credentials.

Frequently asked questions

What is CVE-2021-41019?: An improper validation of certificate with host mismatch [CWE-297] vulnerability in FortiOS versions 6.4.6 and below may allow the connection to a malicious LDAP server via options in GUI, leading to disclosure of sensitive information, such as AD credentials.
How severe is CVE-2021-41019?: CVE-2021-41019 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-41019 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41019?: CVE-2021-41019 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-41019?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-41019 published?: CVE-2021-41019 was published on 2021-11-02 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-21-074

Affected products (1)

cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

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