How severe is CVE-2021-1546?

CVE-2021-1546 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-1546 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-1546?

CVE-2021-1546 primarily affects Cisco Catalyst Sd-wan Manager. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-1546?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-1546 published?

CVE-2021-1546 was published on 2021-09-23 and last updated on 2026-06-17.

CVE-2021-1546

CVE-2021-1546 is a medium-severity vulnerability in Cisco Catalyst Sd-wan Manager with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-209.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Cisco Catalyst Sd-wan Manager
Published: 2021-09-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-1546?: 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.
How severe is CVE-2021-1546?: CVE-2021-1546 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-1546 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-1546?: CVE-2021-1546 primarily affects Cisco Catalyst Sd-wan Manager. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-1546?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-1546 published?: CVE-2021-1546 was published on 2021-09-23 and last updated on 2026-06-17.

References

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

Affected products (12)

cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vmanage:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vsmart_controller_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_1000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_100b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_100m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_100wm_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_2000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_5000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:vedge_cloud_firmware:*:*:*:*:*:*:*:*

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