VulnSocial

CVE-2026-78519(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

Use of uninitialized resource in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

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0.5/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-908

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
  • office_2019
  • office_2021
  • office_2024

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Affected systems

Vendors
microsoft
Products
365_appsoffice_2019office_2021office_2024outlook

2 versions affected across 5 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-11-04: 111-04
Full discourse1 post
  • Shmuel Uzan@shmuel_uzan

    Happy to share that a vulnerability @smgoreli and I discovered in Microsoft Outlook has been assigned CVE-2026-78519, a RCE with a CVSS score of 8.8 This is just one piece of the puzzle, with another related vulnerability still awaiting disclosure. https://t.co/ueQhuBYVxp

    0100092
    41 followersView on X
CPE platform detail10 entries

10 of 10 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoft365_apps--x64
Appmicrosoft365_apps--x86
Appmicrosoftoffice_2019--x64
Appmicrosoftoffice_2019--x86
Appmicrosoftoffice_2021--x64
Appmicrosoftoffice_2021--x86
Appmicrosoftoffice_2024--x64
Appmicrosoftoffice_2024--x86
Appmicrosoftoutlook2016-x64
Appmicrosoftoutlook2016-x86

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