CVE-2021-27799
ean_leading_zeroes in backend/upcean.c in Zint Barcode Generator 2.19.1 has a stack-based buffer...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-27799- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-27799- Updated
- 2026-11-02
EUVDEUVD-2021-14540 No score
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.
- Record
EUVD-2021-14540- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rr98-pccv-8m4w No score
ean_leading_zeroes in backend/upcean.c in Zint Barcode Generator 2.19.1 has a stack-based buffer...
ean_leading_zeroes in backend/upcean.c in Zint Barcode Generator 2.19.1 has a stack-based buffer overflow that is reachable from the C API through an application that includes the Zint Barcode Generator library code.
- Record
GHSA-rr98-pccv-8m4w- Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-27799- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-27799
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.
- Record
DEBIAN-CVE-2021-27799- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-27799
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.
- Record
UBUNTU-CVE-2021-27799- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
zintDebian:12 |
before 2.9.1-1.1 | 2.9.1-1.1 |
zintDebian:13 |
before 2.9.1-1.1 | 2.9.1-1.1 |
zintDebian:14 |
before 2.9.1-1.1 | 2.9.1-1.1 |
zintUbuntu:22.04:LTS |
All versions, plus listed versions 2.9.1-1.12.10.0-1 |
None known |
zintUbuntu:24.04:LTS |
All versions, plus listed versions 2.12.0-12.13.0-12.13.0-1build22.13.0-1build3 |
None known |
zintUbuntu:25.10 |
All versions, plus listed versions 2.13.0-1build32.15.0-1 |
None known |
zintUbuntu:26.10 |
All versions, plus listed versions 2.15.0-1build12.15.0-2 |
None known |
zintUbuntu:26.04:LTS |
All versions, plus listed versions 2.15.0-12.15.0-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27799 is a high vulnerability (CVSS 7.5) in Zint Barcode Generator, published February 26, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.37%, the 83rd percentile. Fixed in zint 2.9.1-1.1.