CVE-2021-1486 Cisco SD-WAN vManage HTTP Authentication User Enumeration Vulnerability
Unauthenticated attackers can enumerate valid user accounts by analyzing HTTP response differences in Cisco SD-WAN vManage.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1486?
CVE-2021-1486 is a medium-severity vulnerability in Cisco Catalyst Sd-Wan Manager, published on 6 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to enumerate user accounts. This vulnerability is due to the improper handling of HTTP headers. An attacker could exploit this vulnerability by sending authenticated requests to an affected system. A successful exploit could allow the attacker to compare the HTTP responses that are returned by the affected system to determine which accounts are valid user accounts.
Weakness: CWE-203
Which versions are affected by CVE-2021-1486?
It affects 2 products.
Products include Cisco Catalyst Sd-Wan Manager, Cisco Sd-Wan Vmanage.
How do I fix CVE-2021-1486?
No fix has been published for CVE-2021-1486 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-1486 being exploited?
There is no known exploitation of CVE-2021-1486 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-q9x7-rrj5-j549.