How severe is CVE-2021-26107?

CVE-2021-26107 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-26107 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26107?

CVE-2021-26107 primarily affects Fortinet Fortimanager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26107?

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

When was CVE-2021-26107 published?

CVE-2021-26107 was published on 2021-11-02 and last updated on 2026-06-17.

CVE-2021-26107

CVE-2021-26107 is a medium-severity vulnerability in Fortinet Fortimanager with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 4.0
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Fortinet Fortimanager
Published: 2021-11-02
Last modified: 2026-06-17

Description

An improper access control vulnerability [CWE-284] in FortiManager versions 6.4.4 and 6.4.5 may allow an authenticated attacker with a restricted user profile to modify the VPN tunnel status of other VDOMs using VPN Manager.

Frequently asked questions

What is CVE-2021-26107?: An improper access control vulnerability [CWE-284] in FortiManager versions 6.4.4 and 6.4.5 may allow an authenticated attacker with a restricted user profile to modify the VPN tunnel status of other VDOMs using VPN Manager.
How severe is CVE-2021-26107?: CVE-2021-26107 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-26107 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26107?: CVE-2021-26107 primarily affects Fortinet Fortimanager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26107?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26107 published?: CVE-2021-26107 was published on 2021-11-02 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:fortinet:fortimanager:6.4.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortimanager:6.4.5:*:*:*:*:*:*:*

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