High severity7.5NVD Advisory· Published Feb 26, 2021· Updated Jun 17, 2026

CVE-2021-27799

Description

ean_leading_zeroes in backend/upcean.c in Zint Barcode Generator 2.9.1 has a stack-based buffer overflow that is reachable from the C API through an application that includes the Zint Barcode Generator library code.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Zint/Barcode Generatordescription
Zint Barcode Generator/Zint Barcode Generatorllm-create
Range: <2.9.1
Zint Barcode Generator/Zintllm-create
Range: <2.9.1

Patches

Vulnerability mechanics

References

sourceforge.net/p/zint/code/ci/7f8c8114f31c09a986597e0ba63a49f96150368a/nvdPatchThird Party Advisory
sourceforge.net/p/zint/tickets/218/nvdExploitThird Party Advisory
zint.org.uk/Manual.aspxnvdVendor Advisory
zint.org.uk/Manual.aspxnvdVendor Advisory
zint.org.uk/Manual.aspxnvdVendor Advisory

News mentions

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epss	0.002
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ransomware	0.000