CVE-2019-19720

Name: CVE-2019-19720
Creator: NVD / NIST
Published: 2019-12-11T04:15:10.667+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.25%

Last modified Jun 17, 2026

CVE-2019-19720 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Yabasic 2.86.1 has a heap-based buffer overflow in the yylex() function in flex.c via a crafted BASIC source file.. EPSS estimates a 1.25% chance of exploitation in the next 30 days.

Description

Yabasic 2.86.1 has a heap-based buffer overflow in the yylex() function in flex.c via a crafted BASIC source file.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.25%

65.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Yabasic	Yabasic	2.86.1

References

http://www.yabasic.de/whatsnew.htmlRelease Notes, Vendor Advisory
https://github.com/marcIhm/yabasic/issues/36Exploit, Third Party Advisory
http://www.yabasic.de/whatsnew.htmlRelease Notes, Vendor Advisory
https://github.com/marcIhm/yabasic/issues/36Exploit, Third Party Advisory

Timeline

Published: Dec 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19720?

Yabasic 2.86.1 has a heap-based buffer overflow in the yylex() function in flex.c via a crafted BASIC source file.

How severe is CVE-2019-19720?

CVE-2019-19720 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.25% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19720?

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.

Are you affected by CVE-2019-19720?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST