What is CVE-2021-1305?

CVE-2021-1305 is a high-severity vulnerability in Cisco Sd-Wan Vmanage, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2021-01-20.

How severe is CVE-2021-1305?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Cisco Sd-Wan Vmanage

CVE-2021-1305

Multiple vulnerabilities in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to bypass authorization and modify the configuration of an affected system, gain access to sensitive information, and view information that they are not authorized to access. For more information about these vulnerabilities, see the Details section of this advisory.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-01-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (70.5th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000

Affected products

Weakness classification (CWE)

References

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

Frequently asked questions

What is CVE-2021-1305?: CVE-2021-1305 is a high-severity vulnerability in Cisco Sd-Wan Vmanage, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2021-01-20.
How severe is CVE-2021-1305?: High severity. CVSS v3 base score is 8.8 out of 10.