What is CVE-2019-25656?

CVE-2019-25656 is a high-severity vulnerability in R-project R I386, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-04-05.

How severe is CVE-2019-25656?

High severity. CVSS v3 base score is 8.4 out of 10.

Buffer overflow in R-project R I386

CVE-2019-25656

R i386 3.5.0 contains a local buffer overflow vulnerability in the GUI Preferences dialog that allows local attackers to trigger a structured exception handler (SEH) overwrite by supplying malicious input. Attackers can craft a payload str…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

R-project R I386 — versions 3.5.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

ExploitDB-46288 (exploit)
Official Product Homepage (product)
Product Reference (product)
VulnCheck Advisory: R i386 3.5.0 Local Buffer Overflow SEH (third-party-advisory)

Frequently asked questions

What is CVE-2019-25656?: CVE-2019-25656 is a high-severity vulnerability in R-project R I386, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-04-05.
How severe is CVE-2019-25656?: High severity. CVSS v3 base score is 8.4 out of 10.