CVE-2019-25656

HIGHNVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-04-05. NVD baseline CVSS 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
54(Track*)
EG Risk 54/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity84% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

April 5, 2026

Last Modified

July 24, 2026

Advisory Details (3)

Auto-updated Jun 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

R i386 3.5.0 Local Buffer Overflow SEH | Advisories | VulnCheck

https://www.vulncheck.com/advisories/r-i386-local-buffer-overflow-seh
generic

R: The R Project for Statistical Computing

https://www.r-project.org/
generic🟡 PoC Available

R 3.5.0 - Local Buffer Overflow (SEH) - Windows local Exploit

https://www.exploit-db.com/exploits/46288

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 143 total refreshes for this CVE.

  1. 2026-07-26 14:51 UTCEPSS rescore
  2. 2026-07-26 09:07 UTCEG score recompute
  3. 2026-07-26 09:07 UTCGHSA enrichment
  4. 2026-07-25 14:14 UTCEPSS rescore
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  6. 2026-07-24 14:14 UTCEPSS rescore
  7. 2026-07-23 14:15 UTCEPSS rescore
  8. 2026-07-23 01:44 UTCEG score recompute
  9. 2026-07-22 22:25 UTCEG score recompute
  10. 2026-07-22 14:05 UTCEPSS rescore
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  39. 2026-06-13 22:58 UTCEPSS rescore
  40. 2026-06-12 23:09 UTCEPSS rescore
  41. 2026-06-11 21:46 UTCGHSA enrichment
  42. 2026-06-11 13:58 UTCEPSS rescore
  43. 2026-06-10 22:16 UTCEPSS rescore
  44. 2026-06-10 15:14 UTCGHSA enrichment
  45. 2026-06-10 13:19 UTCEPSS rescore
  46. 2026-06-10 02:45 UTCGHSA enrichment
  47. 2026-06-09 14:16 UTCGHSA enrichment
  48. 2026-06-08 14:15 UTCEPSS rescore
  49. 2026-06-08 11:44 UTCGHSA enrichment
  50. 2026-06-07 23:09 UTCGHSA enrichment
  51. 2026-06-07 10:40 UTCGHSA enrichment
  52. 2026-06-06 13:45 UTCEPSS rescore
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  74. 2026-05-22 21:16 UTCEPSS rescore
  75. 2026-05-22 21:16 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2019-25656?
CVE-2019-25656 is a high vulnerability published on April 5, 2026. 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…
When was CVE-2019-25656 disclosed?
CVE-2019-25656 was first published in the National Vulnerability Database on April 5, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-25656 actively exploited?
CVE-2019-25656 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.5% of all scored CVEs.
What is the CVSS score of CVE-2019-25656?
CVE-2019-25656 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2019-25656?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-25656, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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