Microsoft Excel Information Disclosure Vulnerability
Priority LOW 26CWE-908Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.
Summary
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00541 45th percentileScored 2026-11-07
Fix Fixed Microsoft: 2 updates
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 to before 16.0.20326.20138 | 16.0.20326.20138 | Patch available | CNA |
| Microsoft | Microsoft Excel 2016 | 16.0.0.0 to before 16.0.5569.1003 | 16.0.5569.1003 | Patch available | CNA |
| Microsoft | Microsoft Office 2016 | 16.0.0 to before 16.0.5569.1003 | 16.0.5569.1003 | Patch available | CNA |
| Microsoft | Microsoft Office 2019 | 19.0.0 to before 16.0.10417.20207 | 16.0.10417.20207 | Patch available | CNA |
| Microsoft | Microsoft Office 365 for Mac | 1.0.0 to before 16.113.26091433 | 16.113.26091433 | Patch available | CNA |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 to before 16.0.14334.20906 | 16.0.14334.20906 | Patch available | CNA |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 to before 16.0.17932.20976 | 16.0.17932.20976 | Patch available | CNA |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 to before 16.113.26091433 | 16.113.26091433 | Patch available | CNA |
| Microsoft | Microsoft Office LTSC for Mac 2024 | 16.0.0 to before 16.113.26091433 | 16.113.26091433 | Patch available | CNA |
- Microsoft 365 Apps for Enterprise VendorMicrosoft Affected 16.0.1 to before 16.0.20326.20138 Fixed in 16.0.20326.20138 Patch available CNA
- Microsoft Excel 2016 VendorMicrosoft Affected 16.0.0.0 to before 16.0.5569.1003 Fixed in 16.0.5569.1003 Patch available CNA
- Microsoft Office 2016 VendorMicrosoft Affected 16.0.0 to before 16.0.5569.1003 Fixed in 16.0.5569.1003 Patch available CNA
- Microsoft Office 2019 VendorMicrosoft Affected 19.0.0 to before 16.0.10417.20207 Fixed in 16.0.10417.20207 Patch available CNA
- Microsoft Office 365 for Mac VendorMicrosoft Affected 1.0.0 to before 16.113.26091433 Fixed in 16.113.26091433 Patch available CNA
- Microsoft Office LTSC 2021 VendorMicrosoft Affected 16.0.1 to before 16.0.14334.20906 Fixed in 16.0.14334.20906 Patch available CNA
- Microsoft Office LTSC 2024 VendorMicrosoft Affected 16.0.0 to before 16.0.17932.20976 Fixed in 16.0.17932.20976 Patch available CNA
- Microsoft Office LTSC for Mac 2021 VendorMicrosoft Affected 16.0.1 to before 16.113.26091433 Fixed in 16.113.26091433 Patch available CNA
- Microsoft Office LTSC for Mac 2024 VendorMicrosoft Affected 16.0.0 to before 16.113.26091433 Fixed in 16.113.26091433 Patch available CNA
CPE configurations NVD · 15
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:* | 2016 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:* | 2016 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:* | not specified by NVD | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:* Versions 2016 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:* Versions 2016 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:* Versions not specified by NVD Vulnerable ·Microsoft
Show 5 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:* | not specified by NVD | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:* Versions not specified by NVD Vulnerable ·Microsoft
Remediation
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Information Disclosure
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Unlikely
| Product | Status | Plan or fix |
|---|---|---|
| Microsoft 365 Apps for Enterprise for 32-bit Systems | Fixed | 16.0.20326.20138 · Security Update |
| Microsoft 365 Apps for Enterprise for 64-bit Systems | Fixed | 16.0.20326.20138 · Security Update |
| Microsoft Office 2019 for 32-bit editions | Fixed | 16.0.10417.20207 · Security Update |
| Microsoft Office 2019 for 64-bit editions | Fixed | 16.0.10417.20207 · Security Update |
| Microsoft Office 365 for Mac | Fixed | 16.113.26091433 · Security Update |
| Microsoft Office LTSC 2021 for 32-bit editions | Fixed | 16.0.14334.20906 · Security Update |
| Microsoft Office LTSC 2021 for 64-bit editions | Fixed | 16.0.14334.20906 · Security Update |
| Microsoft Office LTSC 2024 for 32-bit editions | Fixed | 16.0.17932.20976 · Security Update |
| Microsoft Office LTSC 2024 for 64-bit editions | Fixed | 16.0.17932.20976 · Security Update |
| Microsoft Office LTSC for Mac 2021 | Fixed | 16.113.26091433 · Security Update |
| Microsoft Office LTSC for Mac 2024 | Fixed | 16.113.26091433 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-81958
- 2026-10-03 Alias added: GHSA-jq46-33px-8m9p
References
More Microsoft 365 Apps vulnerabilities
- TI-2024-14173 Microsoft Outlook Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2023-09240 Microsoft Outlook Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2024-25471 Microsoft Project Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2023-17652 Microsoft Outlook Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2026-17368 Microsoft Word Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 7.8
- TI-2026-17363 Microsoft Office Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 7.8
Sources
- CVE-2026-81958 · CVE Program
- CVE-2026-81958 · NVD
- FIRST EPSS
- GHSA-jq46-33px-8m9p · GitHub Advisory Database · CC BY 4.0
- CVE-2026-81958 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences