What is CVE-2021-1512?

CVE-2021-1512 is a medium-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under Files or Directories Accessible to External Parties. CVSS score: 6.0/10. Published 2021-05-06.

How severe is CVE-2021-1512?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Cisco Catalyst Sd-Wan Manager

CVE-2021-1512

A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to overwrite arbitrary files in the underlying file system of an affected system. This vulnerability is due to insufficient validation of the user-supplied input parameters of a specific CLI command. An attacker could exploit this vulnerability by issuing that command with specific parameters. A successful exploit could allow the attacker to overwrite the content in any arbitrary files that reside on the underlying host file system.

Published 2021-05-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (12.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-552 — Files or Directories Accessible to External Parties

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-ar… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2021-1512?: CVE-2021-1512 is a medium-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under Files or Directories Accessible to External Parties. CVSS score: 6.0/10. Published 2021-05-06.
How severe is CVE-2021-1512?: Medium severity. CVSS v3 base score is 6.0 out of 10.