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Vulnerability record · CVE-2026-33666 · published 24 April 2026

CVE-2026-33666: Nds-association zserio integer overflow vulnerability

Nds Association · Zserio

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.

7.5 CVSS 3.1 High EPSS 0.50% · top 59.8% CWE-190 · Integer overflow
7.5CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj ExploitMitigationVendor Advisory
https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-33666), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.