What is CVE-2026-33666?

CVE-2026-33666 is a high-severity vulnerability in Nds-association Zserio, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-04-24.

How severe is CVE-2026-33666?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Nds-association Zserio

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…

Vulnerability class: Integer Overflow

EPSS: 0.001 (19.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nds-association Zserio
Ndsev Zserio — versions <= 2.15.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwj (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33666?: CVE-2026-33666 is a high-severity vulnerability in Nds-association Zserio, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-04-24.
How severe is CVE-2026-33666?: High severity. CVSS v3 base score is 7.5 out of 10.