CVE-2019-25656
CVE-2019-25656 is a high-severity vulnerability with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.4)
- CVSS v4: 8.6
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2019-20048
- Weakness: CWE-787
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2019-25656?
- CVE-2019-25656 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-25656 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2019-25656?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2019-25656 have an EU (EUVD) identifier?
- Yes. CVE-2019-25656 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-20048.
- When was CVE-2019-25656 published?
- CVE-2019-25656 was published on 2026-04-05 and last updated on 2026-06-17.
References
- https://cran.r-project.org/bin/windows/base/old/3.5.0/R-3.5.0-win.exe
- https://www.exploit-db.com/exploits/46288
- https://www.r-project.org/
- https://www.vulncheck.com/advisories/r-i386-local-buffer-overflow-seh
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