Type Vulnerability
Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities " ": "Talos intelligence and world-class threat research team better protects you and your organisation against…
Microsoft
Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities
CVE-2026-88178
What this means
This is rated critical severity (9.8 out of 10). There is no confirmed exploitation of it yet. Ask IT whether Microsoft 365 Apps, Microsoft Microsoft 365 and Microsoft Office 2021, and 1 more are in your estate, and treat that as the priority.
Full vendor description
Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Scoring and exploitation
9.8/ 10
CVSS 3.1 base scoreCritical
Exploitable over the network without any account, and no one has to click or open anything. High impact on confidentiality, integrity and availability.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability
Longer bar: easier to attack
Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionNoneUI:N
ScopeUnchangedS:U
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
- ~1% estimated chance of attack in 30 daysModel estimate (): a probability signal, not confirmed exploitation
- Exploited in the wild
- Not confirmed in the
- Not reported
Weaknesses
CWE-416
Affected products ()
- Microsoft 365 Apps
- Microsoft Microsoft 365
- Microsoft Office 2021
- Microsoft Office 2024
Show the raw CPE strings (9)
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
- cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*
References
1 link from the CVE record, grouped by site; the vendor's advisory comes first.
msrc.microsoft.com1 linkVendor advisory
- CVE-2026-88178 (opens in a new tab)Vendor Advisory