CVE-2026-45463General(microsoft / 365_apps)

LOWCVSS 8.4 · 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

Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-121CWE-191

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • 365_apps
  • 365_copilot
  • microsoft_365
  • office_2016

Threat summary

  • 1 mentions across 1 observed day

What's happening

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

Affected systems

Vendors
Products
365_apps365_copilotmicrosoft_365office_2016office_2019office_2021office_2024

1 version affected across 7 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-06-09: 1Technical Details · 2026-06-09: 106-09
Signal classification1 categories
General
1100.0%
Referenced assets1 URL
Full discourse1 post
  • WindowsForum@windowsforum
    General

    🪟 Office “remote RCE” with CVSS “Local” is Microsoft’s way of saying: you can *cause* the damage from afar, but your target PC still has to choke on the payload. Terminology whiplash matters. #Windows #Microsoft #Office #CVE https://windowsforum.com/threads/cve-2026-45463-why-office-remote-rce-can-map-to-cvss-local.424449/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #MicrosoftOffice #PatchTriage https://t.co/ELb8ghVJwy

    Post summary

    The tweet references a discussion of CVE‑2026‑45463, noting a discrepancy between a remote RCE vulnerability and its local CVSS rating, but it does not present evidence of exploitation, PoC, patch, or debunking.

    0000028
    1.2K followersView on X
CPE platform detail14 entries

14 of 14 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoft365_apps--x64
Appmicrosoft365_apps--x86
Appmicrosoft365_copilot-android-
Appmicrosoftmicrosoft_365-macos-
Appmicrosoftoffice_2016--x64
Appmicrosoftoffice_2016--x86
Appmicrosoftoffice_2019--x64
Appmicrosoftoffice_2019--x86
Appmicrosoftoffice_2021--x64
Appmicrosoftoffice_2021--x86
Appmicrosoftoffice_2021-macos-
Appmicrosoftoffice_2024--x64
Appmicrosoftoffice_2024--x86
Appmicrosoftoffice_2024-macos-

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