CVE-2018-8310
CVE-2018-8310 is a high-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 5% (92nd percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Office
- Published:
- Last modified:
Description
A tampering vulnerability exists when Microsoft Outlook does not properly handle specific attachment types when rendering HTML emails, aka "Microsoft Office Tampering Vulnerability." This affects Microsoft Word, Microsoft Office.
Frequently asked questions
- What is CVE-2018-8310?
- A tampering vulnerability exists when Microsoft Outlook does not properly handle specific attachment types when rendering HTML emails, aka "Microsoft Office Tampering Vulnerability." This affects Microsoft Word, Microsoft Office.
- How severe is CVE-2018-8310?
- CVE-2018-8310 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2018-8310 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-8310?
- CVE-2018-8310 primarily affects Microsoft Office. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2018-8310?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2018-8310 published?
- CVE-2018-8310 was published on 2018-07-11 and last updated on 2026-06-17.
References
- http://www.securityfocus.com/bid/104615
- http://www.securitytracker.com/id/1041274
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8310
Affected products (6)
- cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office:2016:*:*:*:click-to-run:*:*:*
- cpe:2.3:a:microsoft:word:2010:sp2:*:*:*:*:*:*
- cpe:2.3:a:microsoft:word:2013:sp1:*:*:*:*:*:*
- cpe:2.3:a:microsoft:word:2013:sp1:*:*:rt:*:*:*
- cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*
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