VulnSocial

CVE-2026-55123Patch(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-681

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 “remote” code execution still needs you to open the booby-trapped deck—because apparently clicking presentations is now a security skill. Install KB5002867 before the next “FYI” attachment. https://windowsforum.com/threads/cve-2026-55123-powerpoint-rce-install-kb5002867-to-fix.438749/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #RemoteCodeExecution #MicrosoftPowerpoint https://t.co/WbgMwt0ywj

    Post summary

    The tweet encourages installing KB5002867 to remediate CVE-2026-55123, a remote code execution flaw in PowerPoint, without providing PoC or evidence of active exploitation.

    0000014
    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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