What Three Threat Reports Reveal About Credential Stuffing and Credential Theft in 2026

Three Independent Reports, One Verdict

Three of the industry’s most-cited threat intelligence publications anchored its year-in-review around the same problem: the role of stolen credentials in system breaches.

Verizon’s 2025 Data Breach Investigations Report — built from more than 22,000 real-world security incidents — found that stolen credentials accounted for 22% of all breaches, the single most common initial access vector. 

Meanwhile, IBM’s X-Force Threat Intelligence Index 2026 reported that credential harvesting overtook all other outcomes as the number one observed impact on victim organizations. 

Finally, CrowdStrike’s 2026 Global Threat Report, informed by trillions of weekly security events and more than 280 tracked adversary groups, documented that 82% of detections in 2025 involved no malware at all.

The convergence matters, because these are not teams that coordinate. Verizon’s DBIR draws from partner-submitted incident data. IBM’s X-Force Index is built on its own incident response caseload and dark web monitoring. CrowdStrike’s Global Threat Report reflects endpoint telemetry from its Falcon platform. Three different data sets, three different windows into the threat landscape, same conclusion: The credential is the target.

The Scale of Credential Theft and Credential Stuffing

The raw numbers explain why credential stuffing remains so effective: The supply is functionally unlimited.

Verizon’s DBIR recorded 2.8 billion passwords posted on criminal forums in 2024 alone. Only three percent of those compromised passwords met basic complexity requirements — meaning 97% were weak enough for automated attacks to exploit in bulk. 

The same report found that brute force attacks against web applications tripled year-over-year, from roughly 20% to 60% of web app attack patterns. In web applications specifically, 88% of basic web app attacks involved stolen credentials. For every 10 web application breaches, nearly nine started with a valid username and password from a prior compromise. 

This is credential stuffing at industrial scale: Automated tools cycling through billions of leaked credentials against login endpoints, exploiting the fact that users reuse passwords across services.

MFA Doesn’t Solve the Problem

One instinctive response to credential stuffing and credential theft is multi-factor authentication. However, data shows that that response is insufficient.

Obsidian Security analyzed compromised SaaS accounts in 2025 and found that more than 80% had MFA enabled at the time of compromise. That number disqualifies MFA as a standalone credential-stuffing-prevention strategy. That’s because while MFA protects the moment of authentication (i.e., the login screen), it doesn’t protect the session token issued afterward. 

Verizon’s DBIR broke down the MFA bypass landscape for Microsoft 365 environments: Token theft accounted for 31% of breaches, MFA fatigue and prompt bombing accounted for 22%, and adversary-in-the-middle (AitM) attacks accounted for 9%. 

How AitM Attacks Defeat MFA via Phishing

Though not as common as other MFA bypasses, AitM attacks are especially concerning, given their new accessibility.  Eleven commercial phishing-as-a-service platforms now sell AitM toolkits — including Evilginx, Modlishka, and Muraena — enabling attackers with no development skills to deploy session hijacking at scale.

The AitM attack chain is straightforward: 

• The victim receives a phishing email with a link to an attacker-controlled reverse proxy.

• The proxy renders a pixel-perfect replica of the legitimate login page (Microsoft 365, Okta, Google Workspace).

• The victim enters credentials and completes MFA normally — the proxy relays everything to the real identity provider.

• The identity provider issues a valid session token.

• The proxy captures the session token before it reaches the victim’s browser.

• The attacker now holds a fully authenticated session — no additional MFA challenge required.

This attack makes the MFA step irrelevant. The victim completed it successfully. The attacker has the artifact that matters: the session token. Session tokens are bearer tokens — whoever holds them is authenticated.

It’s clear that attackers aren’t abandoning phishing. They’re retooling it to harvest credentials and session tokens instead of clicks.

The Speed Problem: Why Defenders Are Losing

Even when organizations detect credential theft, the response window has collapsed.

CrowdStrike’s 2026 Global Threat Report placed the average eCrime breakout time — the interval between initial compromise and the attacker moving laterally to a second system — at 29 minutes, 65% faster than the prior year. (The fastest recorded breakout was 27 seconds.) Most security operations centers can’t triage an alert in 29 minutes, let alone contain a lateral movement chain.

And AI is accelerating the attacker side of this equation. CrowdStrike tracked an 89% increase in AI-enabled adversary operations year-over-year. IBM X-Force noted that more than 300,000 ChatGPT credentials were exposed via infostealer malware in 2025 alone — meaning AI tools themselves are being compromised and weaponized through credential theft. 

The 82% malware-free statistic bears repeating here. Four out of five CrowdStrike detections in 2025 involved no malware. The adversary used stolen credentials, native tools, and existing administrative functions. Endpoint detection built to identify malware misses 82% of the problem.

The Government Response

Regulatory and standards bodies have noticed the threat.

In late 2025, the U.S. governmental agencies National Institute of Standards and Technology (NIST) and the Cybersecurity and Infrastructure Security Agency (CISA) published IR 8587, “Protecting Tokens and Assertions from Forgery, Theft, and Misuse.” 

The report addresses the session-hijacking problem head-on by prescribing token lifecycle controls including key rotation schedules — 30 days maximum for multi-tenant cloud service providers, three months for single-tenant environments, and one year for on-premises systems. The document also emphasizes hardware-level key protection and secure-by-design practices for SSO, federation, and API access. 

The guidance responds directly to the Storm-0558 incident, in which forged authentication tokens gave attackers access to Microsoft Exchange Online accounts belonging to U.S. government agencies.

The Risk of Operating in the Cloud

Cloud environments amplify these risks. CrowdStrike tracked a 37% overall increase in cloud-conscious intrusions and a 266% increase in cloud-conscious intrusions by state-nexus actors specifically. Unit 42 found that 99% of more than 680,000 cloud identities analyzed had excessive permissions. That means a single stolen cloud credential grants access far beyond what the legitimate user needs. 

This intersection of credential theft and overprivileged cloud identities creates a blast radius that on-premises environments never had.

What the Data Says Should Change

The convergence across these reports points toward five defensive priorities.

• Eliminate shared secrets wherever possible. The single most effective countermeasure against credential stuffing is removing the credential from the equation. Certificate-based authentication (versus using passwords) via cloud PKI platforms and hardware-bound credentials eliminate this class of vulnerability.

• Protect the session, not just the login. MFA addresses the authentication moment, but session hijacking and AitM attacks both target the post-authentication token. NIST IR 8587 provides a framework for token binding, key rotation, and hardware-protected session keys. Organizations should evaluate token-binding implementations that tie sessions to specific devices and cryptographic keys.

• Reduce breakout time to detection ratio. With 29-minute average breakout times, organizations need automated containment. Identity Threat Detection and Response (ITDR) platforms that monitor for anomalous credential use, impossible travel, and token replay close the gap between compromise and containment.

• Address the Bring Your Own Device (BYOD) credential leak. Verizon’s 2025 DBIR data showed that 46% of compromised devices with corporate logins were non-managed or BYOD. Organizations need enrollment and authentication solutions that extend identity verification to personal devices without requiring full device management.

• Audit machine and non-human identities. Credential theft extends beyond human users. One SANS survey found 76% of organizations report growth in non-human and machine identities, and 74% are deploying AI systems that require autonomous credentials. Organizations must focus their scrutinization on service accounts, API tokens, and agent credentials, too.

How Certificate-Based Authentication Breaks the Credential-stuffing Chain

Every mitigation discussed above — MFA, rate limiting, password managers, breached-credential monitoring — operates within the password paradigm. The data from these three major reports shows that that approach has hit its ceiling. Now, companies need to start exploring more robust protection measures, such as certificate-based authentication via Extensible Authentication Protocol–Transport Layer Security (EAP-TLS).

Certificate-based authentication via EAP-TLS uses asymmetric cryptography. A device holds a private key that never leaves hardware-protected storage. The corresponding public key is embedded in an X.509 certificate signed by a trusted certificate authority. Authentication requires proving possession of the private key. No password is transmitted, stored, or available for interception.

This eliminates the credential class that fuels every attack we’ve discussed here:

• Credential stuffing requires a reusable credential. Certificates are per-device and per-user. There is no credential to stuff.

• Infostealers extract passwords from browser stores and credential managers. Private keys stored in hardware-protected enclaves can’t be exported or copied.

• AitM and session hijacking both depend on intercepting a session token after a password-based MFA flow. Mutual TLS validates both server and client certificates. An attacker-controlled proxy cannot present a valid server certificate, and the client refuses the connection before credentials are exchanged.

• Dark web credential markets sell username-password pairs in bulk. Hardware-bound private keys cannot be exfiltrated and so can’t be listed on the dark web.

For organizations running Wi-Fi and VPN infrastructure, SecureW2 JoinNow Cloud RADIUS eliminates password-based authentication from network access entirely. Managed and unmanaged devices authenticate via EAP-TLS using certificates issued by our cloud-managed PKI. Every authentication event is verified in real time against the organization’s identity provider — Entra ID, Okta, or Google Workspace — so that a disabled user or non-compliant device is denied access at the next connection attempt.

JoinNow MultiOS also provides self-service certificate enrollment for unmanaged, BOYD devices, eliminating the need for users to know or enter Wi-Fi passwords while binding authentication to a device-specific cryptographic identity.

Want to learn more about how SecureW2 can help keep your organization safe from credential-stuffing attacks?