VulnSocial

CVE-2026-55134Patch(microsoft / 365_apps)

LOWCVSS 7.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch microsoft 365_apps systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

microsoft CVEsBack to dashboard
1.0/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-121

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

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

  • 365_apps
  • microsoft_365
  • office_2019
  • office_2021

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
microsoft
Products
365_appsmicrosoft_365office_2019office_2021office_2024sharepoint_serverword

3 versions affected across 7 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-15: 1Patch / Workaround · 2026-07-15: 1Technical Details · 2026-07-15: 107-15
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
Full discourse1 post
  • Windows Forum@windowsforum
    Patch

    🪟 Word’s “local” RCE still means trouble: attackers just need you to open the booby-trapped file. Patch July’s update before one document turns into a full system party. https://windowsforum.com/threads/cve-2026-55134-patch-microsoft-word-rce-in-july-2026-updates.438736/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #RemoteCodeExecution #MicrosoftWord #OfficeSecurity #Cve202655134 https://t.co/9CpDPJ3oKH

    Post summary

    The post warns about a local RCE in Microsoft Word (CVE‑2026‑55134) and urges users to apply the upcoming July patch to prevent exploitation.

    0000016
    1.2K followersView on X
CPE platform detail16 entries

16 of 16 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoft365_apps--x64
Appmicrosoft365_apps--x86
Appmicrosoftmicrosoft_365-macos-
Appmicrosoftoffice_2019--x64
Appmicrosoftoffice_2019--x86
Appmicrosoftoffice_2021--x64
Appmicrosoftoffice_2021--x86
Appmicrosoftoffice_2021-macos-
Appmicrosoftoffice_2024--x64
Appmicrosoftoffice_2024--x86
Appmicrosoftoffice_2024-macos-
Appmicrosoftsharepoint_server---
Appmicrosoftsharepoint_server2016--
Appmicrosoftsharepoint_server2019--
Appmicrosoftword2016-x64
Appmicrosoftword2016-x86

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