Local Buffer Overflow in R i386 3.5.0 by R Project
CVE-2019-25656

8.6HIGH

Key Information:

Vendor

R-project

Status
R I386
Vendor
CVE Published:
5 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25656?

R i386 version 3.5.0 features a security vulnerability that allows local attackers to exploit a buffer overflow in the GUI Preferences dialog. By inputting crafted strings in the 'Language for menus and messages' field, attackers can manipulate the structured exception handler (SEH) to overwrite its records. Successful exploitation may lead to unauthorized code execution, potentially enabling execution of arbitrary commands or malicious payloads.

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Affected Version(s)

R i386 3.5.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25656 - Proof of Concept

References

https://www.exploit-db.com/exploits/46288
exploit
https://www.r-project.org/
product
https://cran.r-project.org/bin/windows/base/old/3.5.0/R-3...
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dino Covotsos - Telspace Systems
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