All three techniques are still responsible for a huge portion of account takeovers in 2026, but the balance has shifted noticeably over the last two years.
Here’s a straightforward comparison of how they actually behave today, success rates, noise level, cost to the attacker, and which one is currently causing the most damage.
Credential Stuffing Take leaked username:password pairs from old breaches → try them on as many sites as possible.
In 2026:
1. Success rate: 0.3–1.8 % on consumer sites (gaming, crypto, old e-commerce), 0.05–0.4 % on enterprise accounts with MFA.
2. Noise level: high — thousands to millions of attempts from similar IPs/user-agents → easy to spot with velocity alerts.
3. Cost to attacker: almost free (leaked combos + open-source tools like OpenBullet, SentryMBA forks).
4. Currently, the favorite targets of attackers: alienated accounts, old websites lacking MFA, and also Crypto Exchanges that allow for password reuse
5. Trend: declining sharply because most big services enforce breached-password checks and MFA.
Password Spraying Take one (or a small list) of weak/common passwords → try them across many usernames on one target site.
In 2026:
1. Success rate: 0.1–0.8 % per campaign (higher on legacy systems or non-MFA tenants).
2. Noise level: very low — few attempts per account → hard to detect without impossible-travel or lockout-pattern alerts.
3. Cost to attacker: almost free (just scripting).
4. Preferred Attacks: Microsoft 365/Azure AD tenants (especially legacy basic auth endpoints), VPN portals, and internal older systems.
5. Trend: making a strong comeback because many organizations still force 90-day password changes → users recycle weak passwords (“Summer2026!”, “CompanyName2026”).
Hybrid Attacks (Stuffing + Spraying) Spray common passwords first to find “soft” accounts (no MFA, weak passwords), then switch to full credential stuffing only on those promising accounts.
In 2026:
1. Success rate: 1–4 % (best of both worlds, low noise + high precision).
2. Noise level: high only during the final stuffing phase (which is targeted, so harder to spot).
3. Cost for Attacker: Relatively low/medium (smarter orchestration needed for high-value accounts, but still low-cost).
4. High-Value Targets: High-Payment Enterprise Accounts only (finance; health care, SaaS Admins, privileged O365 Users).
5. Trend: this is the current winner. Most large 2025–2026 breaches that started with “just one compromised account” followed the hybrid pattern, spray to find weak MFA-less accounts → stuff full combos on them → initial foothold → ransomware/lateral movement.
Quick Defensive Checklist for 2026
1. Enforce MFA everywhere (push hardware keys for admins)
2. Block common passwords at creation (Microsoft banned list + Have I Been Pwned integration)
3. Alert on impossible travel + high-velocity failed logins from single IP
4. Monitor for spraying patterns: low attempts per user, but high unique usernames
5. Rotate service/account passwords every 60–90 days (not user passwords)
6. Use continuous adaptive authentication (risk-based MFA prompt)
7. Log and alert on unusual OAuth consent grants (many hybrid attacks start there)
Credential stuffing is fading, password spraying is resurging, and hybrid is dominating because it’s low-risk and high-reward. The shift explains why breach numbers are still high even though MFA coverage has improved a lot.
