VulnSocial

CVE-2026-55043Patch(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

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

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1.0/ 10 priority

Sources & remediation

Patch / fix
Weakness type (CWE)
CWE-122CWE-190

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_2024powerpoint

2 versions affected across 6 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

    🪟 PowerPoint’s heap overflow needs malicious content opened locally, yet Microsoft calls it “Remote Code Execution.” Remote attacker, local click—because security labels needed their own thesaurus. Patch it. https://windowsforum.com/threads/cve-2026-55043-patch-powerpoint-heap-overflow-rce.438747/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #RemoteCodeExecution #OfficeSecurity https://t.co/Nb8aPOSY9p

    Post summary

    The tweet alerts about a heap overflow in PowerPoint (CVE‑2026‑55043) that Microsoft labels as Remote Code Execution, asserts the need for patching, and does not provide PoC, exploit code, or active exploitation details.

    0000020
    1.2K 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-
Appmicrosoftpowerpoint2016-x64
Appmicrosoftpowerpoint2016-x86

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