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CVE-2026-16971 is a missing brute-force protection vulnerability in the IRIS web application, confirmed in version 2.4.26 and possibly affecting other versions. The flaw affects the MFA OTP validation workflow, where the application does not enforce effective rate limiting, progressive delays, temporary blocking, or account lockout on repeated invalid OTP submissions. Testing showed that the MFA verification endpoint accepted rapid repeated guesses across the full 6-digit OTP space without observable throttling, and that response behavior allowed differentiation between invalid and successful submissions. Because the OTP space is small and the application does not sufficiently restrict repeated verification attempts, an unauthenticated or partially authenticated attacker can systematically guess MFA codes until a valid value is found, undermining the intended protection of multi-factor authentication.
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What an attacker gets, and what they’ve been doing with it.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.