VulnSocial

CVE-2026-26109Disclosure(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

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

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0.5/ 10 priority

Sources & remediation

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

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

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

  • 365_apps
  • excel
  • office
  • office_long_term_servicing_channel

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-03-10); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
microsoft
Products
365_appsexcelofficeoffice_long_term_servicing_channeloffice_online_server

5 versions affected across 5 products

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-03-10: 1Mentions · 2026-03-16: 1Technical Details · 2026-03-10: 1Technical Details · 2026-03-16: 103-1003-16
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-26109 Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally. https://www.cve.org/CVERecord?id=CVE-2026-26109

    Post summary

    The text announces CVE-2026-26109, describing an out-of-bounds read in Microsoft Excel that could enable local code execution, with no PoC, exploit code, or patch details provided.

    00000184
    56.7K followersView on X
  • The Hacker Wire@TheHackerWire
    Disclosure

    🟠 CVE-2026-26109 - High Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally. https://www.thehackerwire.com/vulnerability/CVE-2026-26109/ https://t.co/MDaqga7P0B

    Post summary

    A new high‑severity CVE (CVE‑2026‑26109) affecting Excel was disclosed, describing an out‑of‑bounds read that can lead to local code execution, with no mention of PoC, exploit, or patch.

    0000026
    133 followersView on X
CPE platform detail13 entries

13 of 13 entries

PartVendorProductVersionTarget SWTarget HW
Appmicrosoft365_apps--x64
Appmicrosoft365_apps--x86
Appmicrosoftexcel2016-x64
Appmicrosoftexcel2016-x86
Appmicrosoftoffice2019-x64
Appmicrosoftoffice2019-x86
Appmicrosoftoffice_long_term_servicing_channel2021-x64
Appmicrosoftoffice_long_term_servicing_channel2021-x86
Appmicrosoftoffice_long_term_servicing_channel2021macos-
Appmicrosoftoffice_long_term_servicing_channel2024-x64
Appmicrosoftoffice_long_term_servicing_channel2024-x86
Appmicrosoftoffice_long_term_servicing_channel2024macos-
Appmicrosoftoffice_online_server---

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