CVE-2021-1528

Name: CVE-2021-1528
Creator: NVD / NIST
Published: 2021-06-04T17:15:09.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2021-1528 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to gain elevated privileges on an affected system. This vulnerability exists because the affected software does not properly restrict access to privileged processes. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to gain elevated privileges on an affected system. This vulnerability exists because the affected software does not properly restrict access to privileged processes. An attacker could exploit this vulnerability by invoking a privileged process in the affected system. A successful exploit could allow the attacker to perform actions with the privileges of the root user.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.25%

15.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-250

Affected Software

Vendor	Product	Versions
Cisco	Catalyst Sd-Wan Manager	>= 20.4, < 20.4.2
Cisco	Catalyst Sd-Wan Manager	>= 20.5, < 20.5.1
Cisco	Sd-Wan Vbond Orchestrator	>= 20.4, < 20.4.2
Cisco	Sd-Wan Vbond Orchestrator	>= 20.5, < 20.5.1
Cisco	Vsmart Controller	>= 20.4, < 20.4.2
Cisco	Vsmart Controller	>= 20.5, < 20.5.1
Cisco	Vedge 100 Firmware	>= 20.4, < 20.4.2
Cisco	Vedge 100 Firmware	>= 20.5, < 20.5.1
Cisco	Vedge 1000 Firmware	>= 20.4, < 20.4.2
Cisco	Vedge 1000 Firmware	>= 20.5, < 20.5.1
Cisco	Vedge 100b Firmware	>= 20.4, < 20.4.2
Cisco	Vedge 100b Firmware	>= 20.5, < 20.5.1
Cisco	Vedge 100m Firmware	>= 20.4, < 20.4.2
Cisco	Vedge 100m Firmware	>= 20.5, < 20.5.1
Cisco	Vedge 100wm Firmware	>= 20.4, < 20.4.2
Cisco	Vedge 100wm Firmware	>= 20.5, < 20.5.1
Cisco	Vedge 2000 Firmware	>= 20.4, < 20.4.2
Cisco	Vedge 2000 Firmware	>= 20.5, < 20.5.1
Cisco	Vedge 5000 Firmware	>= 20.4, < 20.4.2
Cisco	Vedge 5000 Firmware	>= 20.5, < 20.5.1
Cisco	Vedge Cloud Firmware	>= 20.4, < 20.4.2
Cisco	Vedge Cloud Firmware	>= 20.5, < 20.5.1

References

Timeline

Published: Jun 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-1528?

How severe is CVE-2021-1528?

CVE-2021-1528 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2021-1528?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-1528?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST