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Threatist priority CRITICAL 0 HIGH 1 MEDIUM 0 LOW 1

Signals Exploited in the wild (KEV) 0 Patch available 1 No fix listed 1 Has CVE 2

Fix status Fixed 1 Partial 0 Will not fix 0 Deferred 0 No fix listed 1

Impact type Code execution 0 Privilege escalation 0 Security bypass 0 Information disclosure 0 Tampering 0 Denial of service 2 Spoofing 0 Cross-site scripting 0 SQL injection 0

Attack vector Network 2 Adjacent network 0 Local 0 Physical 0

Requirements No authentication 2 No user interaction 2

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Weakness (CWE) CWE-190 Integer Overflow or Wraparound 1 CWE-789 Memory Allocation with Excessive Size Value 1

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TI-2026-26046 CVE-2026-33666

Zserio: Integer Overflow in BitStreamReader on 32-bit platforms

Priority HIGH 72

Zserio is a framework for serializing structured data with a compact and efficient way with low overhead.

CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.00328 · Published 2026-04-24 · No fix listed CWE-190

TI-2026-25917 CVE-2026-33524 · GHSA-cwq5-8pvq-j65j

Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization

Priority LOW 39

Zserio is a framework for serializing structured data with a compact and efficient way with low overhead.

CVSS 3.1HIGH 7.5· Network · No auth · No interaction · EPSS 0.0032 · Published 2026-04-24 · Fixed in 2.18.1 CWE-789

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