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

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 24, 2026 · NIST NVD

   Detected

   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

2. Jun 17, 2026 · NIST NVD

   Updated

   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

Affected

• cpe nds-association/zserioversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-33666

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-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 re

  nvd.nist.gov

References

• Exploit · github.com