CVE-2021-1284 Cisco SD-WAN vManage Software Authentication Bypass Vulnerability
Unauthenticated adjacent attackers can bypass authentication to read and modify configurations in Cisco SD-WAN vManage systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1284?
CVE-2021-1284 is a high-severity authentication bypass vulnerability in Cisco Catalyst Sd-Wan Manager, published on 6 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the web-based messaging service interface of Cisco SD-WAN vManage Software could allow an unauthenticated, adjacent attacker to bypass authentication and authorization and modify the configuration of an affected system. To exploit this vulnerability, the attacker must be able to access an associated Cisco SD-WAN vEdge device. This vulnerability is due to insufficient authorization checks. An attacker could exploit this vulnerability by sending crafted HTTP requests to the web-based messaging service interface of an affected system. A successful exploit could allow the attacker to gain unauthenticated read and write access to the affected vManage system. With this access, the attacker could access information about the affected vManage system, modify the configuration of the system, or make configuration changes to devices that are managed by the system.
Weakness: CWE-284
Which versions are affected by CVE-2021-1284?
It affects 2 products.
Products include Cisco Catalyst Sd-Wan Manager, Cisco Sd-Wan Vmanage.
How do I fix CVE-2021-1284?
No fix has been published for CVE-2021-1284 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-1284 being exploited?
There is no known exploitation of CVE-2021-1284 in the wild and no public exploit code.
Other vulnerabilities in Cisco Catalyst Sd-Wan Manager
- CVE-2026-20182 Cisco Catalyst SD-WAN Controller Authentication Bypass
- CVE-2026-20127 Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass
- CVE-2026-76504 Cisco Catalyst SD-WAN Manager Hex Encoding
- CVE-2026-20245 Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output
- CVE-2022-20775 Cisco SD-WAN Path Traversal
Sources
Also known as GHSA-5frf-w38r-8j6h.