An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, wh
An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory, aka "Microsoft Office Information Disclosure Vulnerability." This affects Word, Microsoft SharePoint Server, Microsoft Office Word Viewer, Microsoft Excel Viewer, Microsoft SharePoint, Microsoft Office.
- Published
- Aug 15, 2018
- Updated
- Jun 16, 2026
- EPSS
- 8.2% · 95th percentile
- CWE
- CWE-125
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Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 8.2%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | excel viewer | cpe:2.3:a:microsoft:excel_viewer |
| microsoft | office | cpe:2.3:a:microsoft:office |
| microsoft | office compatibility pack | cpe:2.3:a:microsoft:office_compatibility_pack |
| microsoft | office web apps | cpe:2.3:a:microsoft:office_web_apps |
| microsoft | office word viewer | cpe:2.3:a:microsoft:office_word_viewer |
| microsoft | sharepoint enterprise server 2013 | cpe:2.3:a:microsoft:sharepoint_enterprise_server_2013 |
| microsoft | sharepoint enterprise server 2016 | cpe:2.3:a:microsoft:sharepoint_enterprise_server_2016 |
| microsoft | sharepoint server | cpe:2.3:a:microsoft:sharepoint_server |
| microsoft | word automation services | cpe:2.3:a:microsoft:word_automation_services |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft excel viewer2007
- microsoft office2010
- microsoft office2013
- microsoft office2016
- microsoft office compatibility packall versions
- microsoft office web apps2010
- microsoft office web apps2013
- microsoft office word viewerall versions
- microsoft sharepoint enterprise server 2013all versions
- microsoft sharepoint enterprise server 2016all versions
- microsoft sharepoint server2013
- microsoft word automation servicesall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.
Microsoft Microsoft Excel Viewer
- 2007 Service Pack 3affected
Microsoft Microsoft Office
- 2010 Service Pack 2 (32-bit editions), 2010 Service Pack 2 (64-bit editions), 2013 RT Service Pack 1, 2013 Service Pack 1 (32-bit editions), 2013 Service Pack 1 (64-bit editions), 2016 (32-bit edition), 2016 (64-bit edition), 2016 Click-to-Run (C2R) for 32-bit editions, 2016 Click-to-Run (C2R) for 64-bit editions, Web Apps 2010 Service Pack 2, Web Apps 2013 Service Pack 1affected
Microsoft Microsoft Office Word Viewer
- Microsoft Office Word Vieweraffected
Microsoft Microsoft SharePoint
- Enterprise Server 2013 Service Pack 1, Enterprise Server 2016affected
Microsoft Microsoft SharePoint Server
- 2013 Service Pack 1affected
Microsoft Word
- Automation Services on Microsoft SharePoint Server 2010 Service Pack 2affected
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2013-3906GDI+ in Microsoft Windows Vista SP2 and Server 2008 SP2; Office 2003 SP3, 2007 SP3, and 2010 SP1 and SP2; Office Compatibility Pack SP3; andKEV86Now
- CVE-2015-2424Microsoft PowerPoint 2007 SP3, Word 2007 SP3, PowerPoint 2010 SP2, Word 2010 SP2, PowerPoint 2013 SP1, Word 2013 SP1, and PowerPoint 2013 RTKEV77This week
- CVE-2008-0113Unspecified vulnerability in Microsoft Office Excel Viewer 2003 up to SP3 allows user-assisted remote attackers to execute arbitrary code vi50Plan
- CVE-2018-8432A remote code execution vulnerability exists in the way that Microsoft Graphics Components handle objects in memory, aka "Microsoft Graphics37Monitor
- CVE-2019-0540A security feature bypass vulnerability exists when Microsoft Office does not validate URLs.An attacker could send a victim a specially craf26Monitor
- CVE-2018-8427An information disclosure vulnerability exists in the way that Microsoft Graphics Components handle objects in memory, aka "Microsoft Graphi23Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-125 · Out-of-bounds ReadCVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/104996
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8378
Vendor advisories and official records. Exploit/PoC links are deliberately left out.