CVE-2021-27799

Public Exploit

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.01% Top 25%
Vendor Advisory org.uk Vendor Advisory org.uk Vendor Advisory org.uk
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://sourceforge.net/p/zint/tickets/218/ third party advisory exploit
http://zint.org.uk/Manual.aspx?type=p&page=3 vendor advisory
http://zint.org.uk/Manual.aspx?type=p&page=4 vendor advisory
http://zint.org.uk/Manual.aspx?type=p&page=5 vendor advisory
https://sourceforge.net/p/zint/code/ci/7f8c8114f31c09a986597e0ba63a49f96150368a/ third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-27799?
CVE-2021-27799 has been scored as a high severity vulnerability.
How to fix CVE-2021-27799?
To fix CVE-2021-27799, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27799 being actively exploited in the wild?
It is possible that CVE-2021-27799 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.