Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-33666

Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, in BitStreamReader.h readBytes() / readString(), the setBitPosition() bounds check receives the overflowed value and is completely bypassed. The code then reads len bytes (512 MB) from a buffer that is only a few bytes long, causing a segmentation fault. This vulnerability is fixed in 2.18.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 12.0%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-33666


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