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 string in the 'Language for menus and messages' field to overwrite SEH records and achieve code execution with calculator or arbitrary shellcode.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (4.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- R-Project R I386 — versions 3.5.0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/46288 (exploit)
- www.r-project.org/ (product)
- cran.r-project.org/bin/windows/base/old/3.5.0/R-3.5.0-win.exe (product)
- www.vulncheck.com/advisories/r-i386-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.