Credential stuffing turns reused passwords into account access
Attackers use breached credentials to log into SaaS applications at scale. When passwords are reused or MFA is missing, access looks like a normal login.
Attackers use breached credentials to log into SaaS applications at scale. When passwords are reused or MFA is missing, access looks like a normal login.
Credential stuffing relies on one simple idea: people reuse passwords.
Attackers take large datasets of stolen credentials and test them across SaaS applications, looking for accounts where the same username and password combination still works.
These attacks don’t require phishing or malware. They rely on valid credentials and normal login flows.
Push data shows how common this is in practice. In recent observations, one in four logins used a password instead of SSO, and two in five were not protected by MFA.
Credential stuffing doesn’t look like an intrusion. It looks like a user logging in.
There are no malicious domains, no suspicious files, and no exploit chain. The credentials are valid, and the authentication flow behaves exactly as expected.
In many cases, these logins happen outside SSO, through direct application login pages. That means the identity provider never sees them, and security teams have limited visibility into how access was granted.
Even when login activity is logged, it can be difficult to distinguish between legitimate and malicious use. The attacker is using real credentials, often from expected locations, and interacting with the application normally.
Since Push is installed directly to the browser, it observes how users log in across applications, including direct login flows that bypass SSO.
Security teams can detect when compromised or reused credentials are being used, identify accounts missing MFA, and surface risky authentication patterns across SaaS apps.
Push also helps reduce exposure. It can prompt users to strengthen weak credentials, enforce MFA adoption, and guide users toward secure login methods.
