Is CVE-2021-27799 in the CISA KEV catalog?

No. CVE-2021-27799 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-27799?

CVE-2021-27799 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-27799?

CVE-2021-27799 has an EPSS score of 2.37% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27799?

Upgrade zint on debian 11 to 2.9.1-1.1 or later.

CVE & CISA-KEV Catalog

CVE-2021-27799

HIGHEPSS 82th pctl

7.5

CVSS v3

NVD

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.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

zintDebian

Fixed in:2.9.1-1.1CVE-2021-27799

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.37%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Patch1

sourceforge.net

Exploit1

sourceforge.net

Vendor Advisory3

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.