VulnSocial

CVE-2026-55054Disclosure(apple / 365_apps)

LOWCVSS 6.5 · MEDIUM

Signal is active with 3 mentions in latest observed window

Immediate actions

  • Patch apple 365_apps systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

apple CVEsBack to dashboard
1.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-125

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
  • excel
  • macos
  • office

Threat summary

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

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • 3 total mentions across 1 day

Affected systems

Vendors
applemicrosoft
Products
365_appsexcelmacosofficeoffice_2021office_2024office_365office_online_server

3 versions affected across 8 products

Deep dive

Activity timeline3 mentions / 1d
01223Mentions · 2026-07-15: 3Patch / Workaround · 2026-07-15: 1Technical Details · 2026-07-15: 207-15
Signal classification3 categories
Disclosure
133.3%
General
133.3%
Patch
133.3%
Referenced assets3 URLs
Full discourse3 posts
  • Windows Forum@windowsforum
    Patch

    🪟 Excel can leak sensitive memory just by opening malicious content. July’s patch is less “new features” and more “please stop spreadsheets from rummaging through RAM.” Update it. https://windowsforum.com/threads/cve-2026-55054-patch-excel-memory-disclosure-with-july-updates.438723/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #InformationDisclosure #MicrosoftExcel #OfficeSecurityUpdates #Cve202655054 https://t.co/PKXqTLBDQY

    Post summary

    CVE‑2026‑55054 causes Excel to leak memory when opening malicious content, and Microsoft has released a July patch to fix the issue; users should update immediately.

    0000020
    1.2K followersView on X
  • DailyCVE@dailycve
    Disclosure

    🟠 #Microsoft Office Excel Out-of-Bounds Read Information Disclosure (#CVE-2026-55054) — MEDIUM -DC-Jul2026-1006 https://dailycve.com/microsoft-office-excel-out-of-bounds-read-information-disclosure-cve-2026-55054-medium-dc-jul2026-1006/

    Post summary

    The tweet announces a new medium‑severity Microsoft Office Excel out‑of‑bounds read information disclosure (CVE‑2026‑55054) and links for details, but provides no PoC, exploit, or fix information.

    0000046
    219 followersView on X
  • MalwareObserver@MalwareObserver
    General

    🐛 VULNERABILITIES CVE Notify: 🚨 [CVE-2026-55054](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55054) Out-of-bou... https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55054 #Vulnerability #CVE #ZeroDay

    Post summary

    The tweet merely announces the CVE with a link to Microsoft’s page, lacking detailed technical or operational information.

    0000036
    11 followersView on X
CPE platform detail15 entries

15 of 15 entries

PartVendorProductVersionTarget SWTarget HW
OSapplemacos---
Appmicrosoft365_apps--x64
Appmicrosoft365_apps--x86
Appmicrosoftexcel2016-x64
Appmicrosoftexcel2016-x86
Appmicrosoftoffice2019-x64
Appmicrosoftoffice2019-x86
Appmicrosoftoffice_2021-macos-
Appmicrosoftoffice_2021--x64
Appmicrosoftoffice_2021--x86
Appmicrosoftoffice_2024-macos-
Appmicrosoftoffice_2024--x64
Appmicrosoftoffice_2024--x86
Appmicrosoftoffice_365---
Appmicrosoftoffice_online_server---

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