How severe is CVE-2020-3437?

CVE-2020-3437 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-3437 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3437?

CVE-2020-3437 affects Cisco Sd-wan Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3437?

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

When was CVE-2020-3437 published?

CVE-2020-3437 was published on 2020-07-16 and last updated on 2026-06-17.

CVE-2020-3437

CVE-2020-3437 is a medium-severity vulnerability in Cisco Sd-wan Firmware with a CVSS 3.x base score of 6.5. 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-59.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Cisco Sd-wan Firmware
Published: 2020-07-16
Last modified: 2026-06-17

Description

A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to read arbitrary files on the underlying filesystem of the device. The vulnerability is due to insufficient file scope limiting. An attacker could exploit this vulnerability by creating a specific file reference on the filesystem and then accessing it through the web-based management interface. A successful exploit could allow the attacker to read arbitrary files from the filesystem of the underlying operating system.

Frequently asked questions

What is CVE-2020-3437?: A vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to read arbitrary files on the underlying filesystem of the device. The vulnerability is due to insufficient file scope limiting. An attacker could exploit this vulnerability by creating a specific file reference on the filesystem and then accessing it through the web-based management interface. A successful exploit could allow the attacker to read arbitrary files from the filesystem of the underlying operating system.
How severe is CVE-2020-3437?: CVE-2020-3437 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-3437 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3437?: CVE-2020-3437 affects Cisco Sd-wan Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3437?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3437 published?: CVE-2020-3437 was published on 2020-07-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:sd-wan_firmware:*:*:*:*:*:*:*:*

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