How severe is CVE-2020-3264?

CVE-2020-3264 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-3264 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3264?

CVE-2020-3264 primarily affects Cisco Sd-wan Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3264?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-3264 published?

CVE-2020-3264 was published on 2020-03-19 and last updated on 2026-06-17.

CVE-2020-3264

CVE-2020-3264 is a high-severity vulnerability in Cisco Sd-wan Firmware with a CVSS 3.x base score of 7.1. 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-120.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v2: 6.6
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Cisco Sd-wan Firmware
Published: 2020-03-19
Last modified: 2026-06-17

Description

A vulnerability in Cisco SD-WAN Solution software could allow an authenticated, local attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access and make changes to the system that they are not authorized to make.

Frequently asked questions

What is CVE-2020-3264?: A vulnerability in Cisco SD-WAN Solution software could allow an authenticated, local attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access and make changes to the system that they are not authorized to make.
How severe is CVE-2020-3264?: CVE-2020-3264 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-3264 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3264?: CVE-2020-3264 primarily affects Cisco Sd-wan Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3264?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-3264 published?: CVE-2020-3264 was published on 2020-03-19 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:cisco:sd-wan_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:20.1.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:20.3.0:*:*:*:*:*:*:*

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