CVE-2021-1546 [Medium] | Information Disclosure in Catalyst Sd-Wan Manager

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.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-11-21	0.06%	0.15%	+0.09%
2	2025-11-18	0.15%	0.06%	-0.09%
3	2025-03-19	—	0.15%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-11-21

0.06%

0.15%

+0.09%

2025-11-18

0.15%

0.06%

-0.09%

2025-03-19

—

0.15%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	1.8	3.6	[email protected]
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	1.8	3.6	[email protected]
2.1	2.0	LOW	`AV:L/AC:L/Au:N/C:P/I:N/A:N` Click to expand Access vector (AV:L) Requires local access to the target system. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	3.9	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

1.8

3.6

[email protected]

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

1.8

3.6

[email protected]

2.1

2.0

LOW

AV:L/AC:L/Au:N/C:P/I:N/A:N Click to expand

Access vector (AV:L): Requires local access to the target system.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:N): No availability impact.

3.9

2.9

[email protected]

Affected software / configurations for CVE-2021-1546

Vendor	Product	Version	Raw CPE
cisco	catalyst_sd-wan_manager	>= 18.4, < 20.4.2	cpe:2.3:a:cisco:catalyst_sd-wan_manager::::::::
cisco	catalyst_sd-wan_manager	>= 20.6, < 20.6.1	cpe:2.3:a:cisco:catalyst_sd-wan_manager::::::::
cisco	sd-wan_vbond_orchestrator	>= 18.4, < 20.4.2	cpe:2.3:a:cisco:sd-wan_vbond_orchestrator::::::::
cisco	sd-wan_vbond_orchestrator	>= 20.5, < 20.5.2	cpe:2.3:a:cisco:sd-wan_vbond_orchestrator::::::::
cisco	sd-wan_vbond_orchestrator	>= 20.6, < 20.6.1	cpe:2.3:a:cisco:sd-wan_vbond_orchestrator::::::::
cisco	sd-wan_vmanage	>= 20.5, < 20.5.2	cpe:2.3:a:cisco:sd-wan_vmanage::::::::
cisco	vsmart_controller_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vsmart_controller_firmware::::::::
cisco	vsmart_controller_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vsmart_controller_firmware::::::::
cisco	vsmart_controller_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vsmart_controller_firmware::::::::
cisco	vedge_100_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_100_firmware::::::::
cisco	vedge_100_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_100_firmware::::::::
cisco	vedge_100_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_100_firmware::::::::
cisco	vedge_1000_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_1000_firmware::::::::
cisco	vedge_1000_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_1000_firmware::::::::
cisco	vedge_1000_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_1000_firmware::::::::
cisco	vedge_100b_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_100b_firmware::::::::
cisco	vedge_100b_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_100b_firmware::::::::
cisco	vedge_100b_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_100b_firmware::::::::
cisco	vedge_100m_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_100m_firmware::::::::
cisco	vedge_100m_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_100m_firmware::::::::
cisco	vedge_100m_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_100m_firmware::::::::
cisco	vedge_100wm_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_100wm_firmware::::::::
cisco	vedge_100wm_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_100wm_firmware::::::::
cisco	vedge_100wm_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_100wm_firmware::::::::
cisco	vedge_2000_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_2000_firmware::::::::
cisco	vedge_2000_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_2000_firmware::::::::
cisco	vedge_2000_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_2000_firmware::::::::
cisco	vedge_5000_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_5000_firmware::::::::
cisco	vedge_5000_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_5000_firmware::::::::
cisco	vedge_5000_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_5000_firmware::::::::
cisco	vedge_cloud_firmware	>= 18.4, < 20.4.2	cpe:2.3:o:cisco:vedge_cloud_firmware::::::::
cisco	vedge_cloud_firmware	>= 20.5, < 20.5.2	cpe:2.3:o:cisco:vedge_cloud_firmware::::::::
cisco	vedge_cloud_firmware	>= 20.6, < 20.6.1	cpe:2.3:o:cisco:vedge_cloud_firmware::::::::

References for CVE-2021-1546

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

URL

CVE-2021-1546 | Cisco SD-WAN Software Information Disclosure Vulnerability

Exploit prediction scoring system (EPSS) score for CVE-2021-1546

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1546

Weakness enumeration for CVE-2021-1546

Affected software / configurations for CVE-2021-1546

References for CVE-2021-1546