CVE-2019-1951

Cisco SD-WAN Solution Packet Filtering Bypass Vulnerability

MEDIUM
5.8
CVSS Score
Published: August 8, 2019 at 07:25 AM UTC
Updated: June 17, 2026 at 02:29 AM UTC
2 products affected across 1 vendorSd WAN FirmwareCisco SD-WAN Solution

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Severity
MEDIUM5.8
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A vulnerability in the packet filtering features of Cisco SD-WAN Solution could allow an unauthenticated, remote attacker to bypass L3 and L4 traffic filters. The vulnerability is due to improper traffic filtering conditions on an affected device. An attacker could exploit this vulnerability by crafting a malicious TCP packet with specific characteristics and sending it to a target device. A successful exploit could allow the attacker to bypass the L3 and L4 traffic filters and inject an arbitrary packet in the network.

Affected

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

v < 19.1.0
Affected range stops below 19.1.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20NVD-CWE-Other

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