CVE-2020-3547 Information disclosure in Cisco Web Security Appliance (WSA)
Authenticated attackers can view masked passwords in the web interface HTML, exposing sensitive credentials on Cisco security appliances.
- 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-2020-3547?
CVE-2020-3547 is a medium-severity vulnerability in Cisco Asyncos, published on 4 Sep 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the web-based management interface of Cisco AsyncOS software for Cisco Email Security Appliance (ESA), Cisco Content Security Management Appliance (SMA), and Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to access sensitive information on an affected device. The vulnerability exists because an insecure method is used to mask certain passwords on the web-based management interface. An attacker could exploit this vulnerability by looking at the raw HTML code that is received from the interface. A successful exploit could allow the attacker to obtain some of the passwords configured throughout the interface.
Which versions are affected by CVE-2020-3547?
It affects 1 product.
Products include Cisco Asyncos.
How do I fix CVE-2020-3547?
No fix has been published for CVE-2020-3547 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-3547 being exploited?
There is no known exploitation of CVE-2020-3547 in the wild and no public exploit code.
Other vulnerabilities in Cisco Asyncos
- CVE-2025-20393 Cisco Multiple Products Improper Input Validation
- CVE-2026-76519 Cisco Secure Email Gateway Relative Path Traversal
- CVE-2026-76461 Cisco Secure Email Gateway SQL Injection
- CVE-2024-20435 Command injection in Cisco Secure Web Appliance
- CVE-2019-15956 Cisco Web Security Appliance Unauthorized Device Reset Vulnerability
Sources
Also known as GHSA-5hr4-4h3v-pvc5.