CVE-2021-39247
MEDIUMCVSS 6.5/10EPSS 0.92%
Last modified
CVE-2021-39247 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zint | Barcode Generator | < 2.10.0 |
References
- https://sourceforge.net/p/zint/code/ci/9b02cd52214e80f945bff41fc94bc1e17e15810c/Patch, Third Party Advisory
- https://sourceforge.net/p/zint/tickets/232/Exploit, Issue Tracking, Patch, Third Party Advisory
- https://sourceforge.net/p/zint/code/ci/9b02cd52214e80f945bff41fc94bc1e17e15810c/Patch, Third Party Advisory
- https://sourceforge.net/p/zint/tickets/232/Exploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-39247?
CVE-2021-39247 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.
How do I fix CVE-2021-39247?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2021-39247?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST