What is CVE-2021-1483?

CVE-2021-1483 is a medium-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.4/10. Published 2024-11-15.

How severe is CVE-2021-1483?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XXE in Cisco Catalyst Sd-Wan Manager

CVE-2021-1483

A vulnerability in the web UI of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to gain read and write access to information that is stored on an affected system. This vulnerability is due to improper handling of XML External Entity (XXE) entries when the affected software parses certain XML files. An attacker could exploit this vulnerability by persuading a user to import a crafted XML file with malicious entries. A successful exploit could allow the attacker to read and write files within the affected application.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Vulnerability class: XXE (XML External Entity)

Published 2024-11-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Cisco Catalyst Sd-Wan Manager — versions 17.2.4, 17.2.5, 17.2.6
Cisco Catalyst Sd-Wan Manager — versions 20.1.12, 19.2.1, 18.4.4

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-… (Vendor Advisory)
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-… (Not Applicable)
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-… (Not Applicable)

Frequently asked questions

What is CVE-2021-1483?: CVE-2021-1483 is a medium-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.4/10. Published 2024-11-15.
How severe is CVE-2021-1483?: Medium severity. CVSS v3 base score is 6.4 out of 10.