How severe is CVE-2015-1571?

CVE-2015-1571 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-1571 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-1571?

CVE-2015-1571 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-1571?

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

When was CVE-2015-1571 published?

CVE-2015-1571 was published on 2015-02-10 and last updated on 2026-06-17.

CVE-2015-1571

CVE-2015-1571 is a medium-severity vulnerability in Fortinet Fortios with a CVSS 2.0 base score of 4.3. 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-310.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Fortinet Fortios
Published: 2015-02-10
Last modified: 2026-06-17

Description

The CAPWAP DTLS protocol implementation in Fortinet FortiOS 5.0 Patch 7 build 4457 uses the same certificate and private key across different customers' installations, which makes it easier for man-in-the-middle attackers to spoof SSL servers by leveraging the Fortinet_Factory certificate and private key. NOTE: FG-IR-15-002 says "The Fortinet_Factory certificate is unique to each device ... An attacker cannot therefore stage a MitM attack.

Frequently asked questions

What is CVE-2015-1571?: The CAPWAP DTLS protocol implementation in Fortinet FortiOS 5.0 Patch 7 build 4457 uses the same certificate and private key across different customers' installations, which makes it easier for man-in-the-middle attackers to spoof SSL servers by leveraging the Fortinet_Factory certificate and private key. NOTE: FG-IR-15-002 says "The Fortinet_Factory certificate is unique to each device ... An attacker cannot therefore stage a MitM attack.
How severe is CVE-2015-1571?: CVE-2015-1571 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-1571 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-1571?: CVE-2015-1571 affects Fortinet Fortios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-1571?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-1571 published?: CVE-2015-1571 was published on 2015-02-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:fortinet:fortios:5.0.7:*:*:*:*:*:*:*

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