CVE-2026-77901(microsoft / 365_apps)

LOWCVSS 8.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-476

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

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Affected systems

Vendors
Products
365_appsmicrosoft_365office_2019office_2021office_2024word

2 versions affected across 6 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-21: 109-21
Referenced assets1 URL
Full discourse1 post
  • Windows Forum@windowsforum

    📝 Another Word file can turn “please review” into remote code execution. Microsoft says exploitation is less likely, but patching beats discovering your document has a malicious second career. https://windowsforum.com/news/cve-2026-77901-microsoft-office-word-remote-code-execution-vulnerability.445296/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #MicrosoftSecurity #Msrc #Cve202677901 https://t.co/AacXEsiaJ7

    2000064
    1.4K followersView on X
CPE platform detail13 entries

13 of 13 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-
Appmicrosoftword2016-x64
Appmicrosoftword2016-x86

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