CVE-2021-39247
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to...
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to is_last_single_ascii in code1.c, and rs_encode_uint in reedsol.c.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to is_last_single_ascii in code1.c, and rs_encode_uint in reedsol.c.
- Record
CVE-2021-39247- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-125
- Updated
- 2026-11-02
CVE List No score
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to is_last_single_ascii in code1.c, and rs_encode_uint in reedsol.c.
- Record
CVE-2021-39247- Updated
- 2026-11-02
EUVDEUVD-2021-25609 No score
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to is_last_single_ascii in code1.c, and rs_encode_uint in reedsol.c.
- Record
EUVD-2021-25609- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-93xv-rpmh-3262 No score
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to...
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to is_last_single_ascii in code1.c, and rs_encode_uint in reedsol.c.
- Record
GHSA-93xv-rpmh-3262- Weakness
- CWE-125
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-39247
Zint Barcode Generator before 2.10.0 has a one-byte buffer over-read, related to is_last_single_ascii in code1.c, and rs_encode_uint in reedsol.c.
- Record
UBUNTU-CVE-2021-39247- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
zintUbuntu:22.04:LTS |
All versions, plus listed versions 2.9.1-1.12.10.0-1 |
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-2021-39247 is a medium vulnerability (CVSS 6.5) in Zint Barcode Generator, published August 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. No source names a fixed version.