Buffer overflow in Microsoft Office
CVE-2018-0802
Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allow a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Office Memory Corruption Vulnerability". This CVE is unique from CVE-2018-0797 and CVE-2018-0812.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.933 (99.8th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.933 · newest: 0.933 · change: 0.000
Affected products
- Microsoft Office — versions 2007, 2010, 2013
- Microsoft Office Compatibility Pack
- Microsoft Word — versions 2007, 2010, 2013
- Microsoft Corporation Equation Editor — versions Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802 (Patch, Vendor Advisory)
- github.com/rxwx/CVE-2018-0802 (Exploit, Third Party Advisory)
- www.securitytracker.com/id/1040153 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- 0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.html (Exploit, Third Party Advisory)
- www.securityfocus.com/bid/102347 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- github.com/zldww2011/CVE-2018-0802_POC (Third Party Advisory)
- research.checkpoint.com/another-office-equation-rce-vulnerability/ (Exploit)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2018-0802?
- CVE-2018-0802 is a high-severity vulnerability in Microsoft Office, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2018-01-10.
- How severe is CVE-2018-0802?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2018-0802 known to be exploited?
- Yes. CVE-2018-0802 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 91 public proof-of-concept repositories are indexed.