CVE-2021-1546

Cisco SD-WAN Software Information Disclosure Vulnerability

MEDIUM

5.5

CVSS Score

Published: September 23, 2021 at 02:30 AM UTC

Updated: June 17, 2026 at 03:32 AM UTC

22 products affected across 1 vendorCatalyst Sd WAN ManagerCisco SD-WAN vManageSd WAN Vbond Orchestrator

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to access sensitive information. This vulnerability is due to improper protections on file access through the CLI. An attacker could exploit this vulnerability by running a CLI command that targets an arbitrary file on the local system. A successful exploit could allow the attacker to return portions of an arbitrary file, possibly resulting in the disclosure of sensitive information.

Affected

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

Catalyst Sd WAN Manager · Cisco

95%

18.4 ≤ v < 20.4.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

Sd WAN Vbond Orchestrator · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

Cisco SD-WAN vManage · Cisco

95%

20.5 ≤ v < 20.5.2

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Vedge 100 Firmware · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

cisco-vedge-100 (same device)

Vedge 1000 Firmware · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

cisco-vedge-1000 (same device)

Vedge 100B Firmware · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

cisco-vedge-100b (same device)

Vedge 100M Firmware · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

cisco-vedge-100m (same device)

Vedge 100WM Firmware · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

cisco-vedge-100wm (same device)

Vedge 2000 Firmware · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

cisco-vedge-2000 (same device)

Vedge 5000 Firmware · Cisco

95%

18.4 ≤ v < 20.4.220.5 ≤ v < 20.5.220.6 ≤ v < 20.6.1

Affected range stops below 20.4.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.5.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 20.6.1, so it looks safe — our inference, not a vendor statement

cisco-vedge-5000 (same device)

Remediation

No guide yet

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

Patch and advisory references

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-Fhqh8pKX

References (1)

Vendor Advisoryx_refsource_CISCO

Source: [email protected]

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-Fhqh8pKX

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

5.5MEDIUMcisco

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-209

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