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CVE-2020-3264

Cisco SD-WAN Solution Buffer Overflow Vulnerability

HIGH
7.1
CVSS Score
Published: March 19, 2020 at 03:35 PM UTC
Updated: June 17, 2026 at 03:17 AM UTC
16 products affected across 1 vendorSd WAN Firmware1100-4G Integrated Services Router1100-6G Integrated Services Router

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Severity
HIGH7.1
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Sd WAN Firmware· Cisco
95%
v < 18.4.519.2.0 ≤ v < 19.2.220.1.020.3.0
Affected range stops below 18.4.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 19.2.2, so it looks safe — our inference, not a vendor statement
cisco-1100-4g-integrated-services-router (environment) · cisco-1100-4gltegb-integrated-services-router (environment) · cisco-1100-4gltena-integrated-services-router (environment) · cisco-1100-6g-integrated-services-router (environment) · cisco-vedge-100 (environment) · cisco-vedge-1000 (environment) · cisco-vedge-100b (environment) · cisco-vedge-100m (environment) · cisco-vedge-100wm (environment) · cisco-vedge-2000 (environment) · cisco-vedge-5000 (environment) · cisco-vedge-cloud-router (environment) · cisco-vmanage-network-management-system (environment) · cisco-vsmart-controller (environment)
Cisco SD-WAN Solution· Cisco
60%
All versions
1100-4G Integrated Services Router· Ciscodevice
80%
All versions
1100-4Gltegb Integrated Services Router· Ciscodevice
80%
All versions
1100-4Gltena Integrated Services Router· Ciscodevice
80%
All versions
1100-6G Integrated Services Router· Ciscodevice
80%
All versions
Vedge 100· Ciscodevice
80%
All versions
Vedge 1000· Ciscodevice
80%
All versions
Vedge 100B· Ciscodevice
80%
All versions
Vedge 100M· Ciscodevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/orangecertcc/security-research/security/advisories/GHSA-wwq2-pxrj-v62r
Vendor Advisoryx_refsource_CISCO
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwanbo-QKcABnS2

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119CWE-120

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