CVE-2026-33666
Last modified
CVE-2026-33666 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nds-Association | Zserio | < 2.18.1 |
References
- https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwjExploit, Mitigation, Vendor Advisory
- https://github.com/ndsev/zserio/security/advisories/GHSA-fjwv-6wcr-vqwjExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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