As enterprise environments become more complex and distributed, identity has emerged as both the foundation and the fault line of cybersecurity. The challenge isn’t that organizations lack tools to manage access—it’s that those tools often fall short in identifying and neutralizing one of the most pervasive and scalable attack vectors today: credential-based threats.

Whether through phishing, infostealers, or credential stuffing, attackers are bypassing traditional defenses by simply logging in—armed with valid credentials stolen or bought on the dark web. For IT leaders, the mandate is clear: identity protection must evolve from static authentication and user provisioning to dynamic, risk-aware detection of account takeover (ATO) in real time.

The Rise of Credential-Based Threats

The scale of the problem is staggering. In 2024 alone, more than 3.2 billion credentials were compromised—a 33% increase from the prior year. These aren’t just stale records sitting in breach databases. Many are still valid and actively used to launch automated login attacks, take over accounts, and move laterally within corporate environments.

A significant portion—75% of these credentials—were harvested by information-stealing malware embedded in endpoints across corporate networks. These “infostealers” have become a core component of the credential attack economy, infecting more than 23 million devices and selling logs on bot marketplaces where credentials are packaged, tagged, and resold for reuse.

Once credentials are compromised, threat actors can bypass firewalls, evade detection tools, and impersonate employees without triggering alerts—because everything about their access appears legitimate.

Why IAM Alone Can’t Keep Up

The latest Gartner Magic Quadrant for Access Management highlights the continued maturity of IAM platforms, which plays a critical role in enabling secure access and enforcing authentication policies. But there’s a critical blind spot: these tools don’t check if the credentials being used are already compromised.

IAM systems typically don’t screen for credential exposure or password reuse. A user can reset their password within policy constraints—and still choose a password that has already been leaked in a breach. The result is a dangerous blind spot: organizations may be enforcing strong authentication practices while unknowingly allowing attackers to walk through the front door.

Credential-Based Threats Bypass Traditional Defenses

Many credential attacks don’t trip alarms because they look like normal logins. This makes them especially dangerous in environments where monitoring is focused on external threats, endpoint anomalies, or privilege escalation.

Credential stuffing—where attackers test stolen username/password pairs en masse—continues to be a favorite tactic due to its simplicity and success rate. Even when multifactor authentication (MFA) is in place, attackers often exploit poor implementation, user fatigue, or social engineering to bypass it.

The risk increases exponentially when credentials are reused across systems or between personal and corporate accounts. Studies show that a large percentage of users—across all industries—still reuse passwords despite training and policy enforcement. This makes it easy for attackers to leverage credentials from a consumer data breach to compromise enterprise systems.

The Supply Chain Effect: Third-Party Credentials Expand the Attack Surface

Credential-based threats aren’t limited to internal employees. Third-party vendors, contractors, and cloud partners often have persistent access into critical systems—and their credentials are just as likely to be compromised.

According to the 2025 SecurityScorecard Third-Party Breach Report, 35.5% of all breaches last year originated from third-party credentials. In industries like technology and retail, more than half of all incidents involved a third-party access vector. Even more alarming: 41.4% of ransomware attacks involved credential-based infiltration via third-party access points.

Modern supply chains are deeply interconnected, and attackers understand that it’s easier to breach a trusted partner than a hardened enterprise perimeter.

Toward a Proactive, Credential-Aware Identity Strategy

To meet the challenge of credential-based threats, security teams must shift from a purely access control mindset to an exposure-aware identity posture. This means incorporating continuous, automated screening of credentials into IAM and authentication workflows—not as a point-in-time check, but as an ongoing hygiene practice.

Key strategies include:

• Real-time credential exposure monitoring to detect when passwords in use have appeared in breach data or bot marketplaces
• Password reuse prevention by enforcing policies that reject breached or predictable passwords
• Lifecycle credential hygiene, not just during onboarding or password resets, but continuously throughout the user’s identity lifecycle
• Contextual risk scoring, where credential exposure status informs adaptive access decisions, step-up authentication, or even account lockdown

Additionally, third-party access should be treated with the same scrutiny as internal access. Vendor accounts, service credentials, and privileged integrations must be monitored for exposure—and governed by strict access controls, least privilege principles, and multi-factor authentication requirements. However, remember while MFA significantly reduces the risk of unauthorized access, it should not be considered infallible and must be paired with ongoing monitoring and access reviews.

The Path Forward

Credential-based threats are no longer edge cases—they are central to how breaches begin, escalate, and succeed. Organizations must stop treating credential compromise as a downstream effect and instead recognize it as a primary entry point.

Identity security can’t stop at policy enforcement or access management. It must include real-time awareness of which credentials are at risk—before they’re exploited.

In a threat landscape dominated by stolen logins and lateral movement, protecting identities means knowing the moment they become vulnerable—and responding before attackers do.

*** This is a Security Bloggers Network syndicated blog from Blog | Enzoic authored by Enzoic. Read the original post at: https://www.enzoic.com/blog/credential-based-threats/