What is CVE-2021-1589?

CVE-2021-1589 is a medium-severity vulnerability in Cisco Sd-Wan Vmanage, classified under Plaintext Storage of a Password. CVSS score: 6.5/10. Published 2021-09-23.

How severe is CVE-2021-1589?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Cisco Sd-Wan Vmanage

CVE-2021-1589

A vulnerability in the disaster recovery feature of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to gain unauthorized access to user credentials. This vulnerability exists because access to API endpoints is not properly restricted. An attacker could exploit this vulnerability by sending a request to an API endpoint. A successful exploit could allow the attacker to gain unauthorized access to administrative credentials that could be used in further attacks.

Published 2021-09-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sd-wan-c… (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-1589?: CVE-2021-1589 is a medium-severity vulnerability in Cisco Sd-Wan Vmanage, classified under Plaintext Storage of a Password. CVSS score: 6.5/10. Published 2021-09-23.
How severe is CVE-2021-1589?: Medium severity. CVSS v3 base score is 6.5 out of 10.