CVE-2021-1241

Cisco SD-WAN Denial of Service Vulnerabilities

HIGH
7.5
CVSS Score
Published: January 20, 2021 at 08:10 PM UTC
Updated: June 17, 2026 at 03:31 AM UTC
14 products affected across 1 vendorCatalyst Sd WAN ManagerSd WAN FirmwareIOS Xe Sd WAN

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Affected

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

All versions
cisco-vedge-100-router (environment) · cisco-vedge-1000-router (environment) · cisco-vedge-100b-router (environment) · cisco-vedge-100m-router (environment) · cisco-vedge-100wm-router (environment) · cisco-vedge-2000-router (environment) · cisco-vedge-5000-router (environment) · cisco-vedge-cloud-router (environment)
cisco-vedge-100-router (environment) · cisco-vedge-1000-router (environment) · cisco-vedge-100b-router (environment) · cisco-vedge-100m-router (environment) · cisco-vedge-100wm-router (environment) · cisco-vedge-2000-router (environment) · cisco-vedge-5000-router (environment) · cisco-vedge-cloud-router (environment)
All versions
cisco-vedge-100-router (environment) · cisco-vedge-1000-router (environment) · cisco-vedge-100b-router (environment) · cisco-vedge-100m-router (environment) · cisco-vedge-100wm-router (environment) · cisco-vedge-2000-router (environment) · cisco-vedge-5000-router (environment) · cisco-vedge-cloud-router (environment)
All versions
All versions
All versions
All versions

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
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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