What is CVE-2021-1513?

CVE-2021-1513 is a high-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-05-06.

How severe is CVE-2021-1513?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Cisco Catalyst Sd-Wan Manager

CVE-2021-1513

A vulnerability in the vDaemon process of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to cause a device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to insufficient handling of malformed packets. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

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

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

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

Frequently asked questions

What is CVE-2021-1513?: CVE-2021-1513 is a high-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-05-06.
How severe is CVE-2021-1513?: High severity. CVSS v3 base score is 7.5 out of 10.