How severe is CVE-2020-3369?

CVE-2020-3369 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-3369 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3369?

CVE-2020-3369 primarily affects Cisco Sd-wan Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3369?

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-2020-3369 published?

CVE-2020-3369 was published on 2020-07-16 and last updated on 2026-06-17.

CVE-2020-3369

CVE-2020-3369 is a high-severity vulnerability in Cisco Sd-wan Firmware with a CVSS 3.x base score of 7.5. 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-118.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-118
Affected product: Cisco Sd-wan Firmware
Published: 2020-07-16
Last modified: 2026-06-17

Description

A vulnerability in the deep packet inspection (DPI) engine of Cisco SD-WAN vEdge Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper processing of FTP traffic. An attacker could exploit this vulnerability by sending crafted FTP packets through an affected device. A successful exploit could allow the attacker to make the device reboot continuously, causing a DoS condition.

Frequently asked questions

What is CVE-2020-3369?: A vulnerability in the deep packet inspection (DPI) engine of Cisco SD-WAN vEdge Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper processing of FTP traffic. An attacker could exploit this vulnerability by sending crafted FTP packets through an affected device. A successful exploit could allow the attacker to make the device reboot continuously, causing a DoS condition.
How severe is CVE-2020-3369?: CVE-2020-3369 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-3369 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3369?: CVE-2020-3369 primarily affects Cisco Sd-wan Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3369?: 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-2020-3369 published?: CVE-2020-3369 was published on 2020-07-16 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fpdos-hORBfd9f

Affected products (5)

cpe:2.3:o:cisco:sd-wan_firmware:19.2.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:19.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:19.2.097:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:19.2.098:*:*:*:*:*:*:*
cpe:2.3:a:cisco:vedge_cloud_router:-:*:*:*:*:*:*:*

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CVE-2015-2002 — Critical (CVSS 9.8): The ESRI ArcGis Runtime SDK before 10.2.6-2 for Android might allow attackers to execute arbitrary code by leveraging a…
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