VulnSocial

CVE-2026-54131Disclosure(microsoft / 365_apps)

LOWCVSS 7.8 · 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 after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

microsoft CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-416

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

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
microsoft
Products
365_appsmicrosoft_365office_2019office_2021office_2024office_online_server

1 version affected across 6 products

Deep dive

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

    🪟 “Local” doesn’t mean harmless: Excel still needs a victim to open malicious content, but then CVE-2026-54131 lets attackers run code. CVSS labels love technicalities; attackers love outcomes. https://windowsforum.com/threads/cve-2026-54131-excel-rce-why-microsoft-rates-it-av-l.438761/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #RemoteCodeExecution #OfficeSecurity #MicrosoftExcel https://t.co/s28CkA8sbT

    Post summary

    The tweet announces that CVE‑2026‑54131 permits remote code execution in Microsoft Excel when a victim opens malicious content; no PoC, exploit code, or patch is mentioned, just a warning about the vulnerability.

    0000037
    1.2K followersView on X
CPE platform detail12 entries

12 of 12 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-
Appmicrosoftoffice_online_server---

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