CVE-2026-83519: Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a n

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CRITICAL 9.8REMOTEWATCHLIST

CVE-2026-83519 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-10-13
Last modified	2026-10-16

Publisher (CNA): Microsoft Corporation

Last updated 2026-10-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-13 19:19 UTCPublished CVE record published
2026-10-16 16:21 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · gcl · FIXED · 2.7.1-12.fc46 · FEDORA-2026-ff383a759b · source

sudo dnf upgrade --advisory=FEDORA-2026-ff383a759b

Fedora ELN · mozjs140 · FIXED · 140.13.0-5.eln159 · FEDORA-2026-f7ed0026e0 · source

sudo dnf upgrade --advisory=FEDORA-2026-f7ed0026e0

Advisories and coverage

Official advisories

Microsoft MSRC Update Guide: CVE-2026-83519 Windows Error Reporting Remote Code Execution Vulnerability 2026-10-26

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-83519?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-83519 being exploited?

CVE-2026-83519 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-83519 affect?

CVE-2026-83519 affects affected software. Severity is critical (CVSS 9.8). Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.

How urgent is CVE-2026-83519?

Priority 64/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Windows vulnerabilities

References

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