VulnSocial

CVE-2026-42903General(microsoft / windows_10_1607)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft windows_10_1607 systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Null pointer dereference in Windows Kerberos allows an authorized attacker to deny service over a network.

microsoft CVEsBack to dashboard
1.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-476

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • windows_10_1607
  • windows_10_1809
  • windows_10_21h2
  • windows_10_22h2

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • General: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-06-09); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
microsoft
Products
windows_10_1607windows_10_1809windows_10_21h2windows_10_22h2windows_11_23h2windows_11_24h2windows_11_25h2windows_11_26h1windows_server_2012windows_server_2016

2 versions affected across 13 products

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-06-09: 1Mentions · 2026-06-10: 1Patch / Workaround · 2026-06-10: 1Technical Details · 2026-06-10: 106-0906-10
Signal classification2 categories
General
150.0%
Patch
150.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-06-091
General1
2026-06-101
Patch1
Full discourse2 posts
  • Andrew@4ndr3w6S
    General

    Thanks @msftsecresponse for recognizing our work on Kerberos 💪 @exploitph was left out of the acknowledgments, but I’m sure we’ll get that fixed! https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-42903 https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-42914 https://t.co/uFrINFDWDd

    Post summary

    The tweet acknowledges work on Kerberos related to CVE-2026-42903 and CVE-2026-42914 but offers no technical, exploit, or patch details.

    33134349.9K
    3.1K followersView on X
  • WindowsForum@windowsforum
    Patch

    🪟 CVE-2026-42903 Kerberos DoS is the kind of “not headline-level” bug that tanks logins anyway. Patch it fast—because AD auth isn’t a suggestion, it’s the lifeblood. #Windows #Microsoft #Kerberos #ActiveDirectory #PatchTuesday https://windowsforum.com/threads/cve-2026-42903-kerberos-dos-patch-tuesday-guidance-for-windows-domains.424792/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsServer https://t.co/e5JZCp5aAE

    Post summary

    The tweet highlights the Kerberos DoS CVE-2026-42903 and urges users to apply the available patch, linking to patch guidance for Windows domains.

    0000054
    1.2K followersView on X
CPE platform detail24 entries

24 of 24 entries

PartVendorProductVersionTarget SWTarget HW
OSmicrosoftwindows_10_1607--x64
OSmicrosoftwindows_10_1607--x86
OSmicrosoftwindows_10_1809--x64
OSmicrosoftwindows_10_1809--x86
OSmicrosoftwindows_10_21h2--arm64
OSmicrosoftwindows_10_21h2--x64
OSmicrosoftwindows_10_21h2--x86
OSmicrosoftwindows_10_22h2--arm64
OSmicrosoftwindows_10_22h2--x64
OSmicrosoftwindows_10_22h2--x86
OSmicrosoftwindows_11_23h2--arm64
OSmicrosoftwindows_11_23h2--x64
OSmicrosoftwindows_11_24h2--arm64
OSmicrosoftwindows_11_24h2--x64
OSmicrosoftwindows_11_25h2--arm64
OSmicrosoftwindows_11_25h2--x64
OSmicrosoftwindows_11_26h1--arm64
OSmicrosoftwindows_11_26h1--x64
OSmicrosoftwindows_server_2012---
OSmicrosoftwindows_server_2012r2--
OSmicrosoftwindows_server_2016---
OSmicrosoftwindows_server_2019---
OSmicrosoftwindows_server_2022---
OSmicrosoftwindows_server_2025--x64

Explore more

Back to dashboardmicrosoft CVEswindows_10_1607 vulnerabilities