CVE-2021-1466 Cisco SD-WAN vDaemon Buffer Overflow Vulnerability
An authenticated local attacker can cause a buffer overflow in the vDaemon service, leading to a denial of service condition.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1466?
CVE-2021-1466 is a medium-severity denial of service vulnerability in Cisco Catalyst Sd-Wan Manager, published on 15 Nov 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the vDaemon service of Cisco SD-WAN vManage Software could allow an authenticated, local attacker to cause a buffer overflow on an affected system, resulting in a denial of service (DoS) condition. The vulnerability is due to incomplete bounds checks for data that is provided to the vDaemon service of an affected system. An attacker could exploit this vulnerability by sending malicious data to the vDaemon listening service on the affected system. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system, which could allow the attacker to cause the vDaemon listening service to reload and result in a DoS condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Weakness: CWE-20
Which versions are affected by CVE-2021-1466?
It affects 1 product.
Products include Cisco Catalyst Sd-Wan Manager.
How do I fix CVE-2021-1466?
No fix has been published for CVE-2021-1466 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-1466 being exploited?
There is no known exploitation of CVE-2021-1466 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-v999-55fc-w9ww.