How severe is CVE-2020-15373?

CVE-2020-15373 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-2020-15373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15373?

CVE-2020-15373 primarily affects Broadcom Fabric Operating System. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-15373?

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-2020-15373 published?

CVE-2020-15373 was published on 2020-09-25 and last updated on 2026-06-17.

CVE-2020-15373

CVE-2020-15373 is a critical-severity vulnerability in Broadcom Fabric Operating System 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-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Broadcom Fabric Operating System
Published: 2020-09-25
Last modified: 2026-06-17

Description

Multiple buffer overflow vulnerabilities in REST API in Brocade Fabric OS versions v8.2.1 through v8.2.1d, and 8.2.2 versions before v8.2.2c could allow remote unauthenticated attackers to perform various attacks.

Frequently asked questions

What is CVE-2020-15373?: Multiple buffer overflow vulnerabilities in REST API in Brocade Fabric OS versions v8.2.1 through v8.2.1d, and 8.2.2 versions before v8.2.2c could allow remote unauthenticated attackers to perform various attacks.
How severe is CVE-2020-15373?: CVE-2020-15373 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-2020-15373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15373?: CVE-2020-15373 primarily affects Broadcom Fabric Operating System. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-15373?: 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-2020-15373 published?: CVE-2020-15373 was published on 2020-09-25 and last updated on 2026-06-17.

References

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2020-1082

Affected products (10)

cpe:2.3:o:broadcom:fabric_operating_system:8.2.1:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.1a:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.1b:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.1c:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.1d:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.2:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.2a:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.2a1:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.2b:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:fabric_operating_system:8.2.2c:*:*:*:*:*:*:*

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