Known exploited vulnerability
CVE-2017-11826
The short answer
CVE-2017-11826 affects Microsoft Corporation Microsoft Office and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-03: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
Microsoft Office 2010, SharePoint Enterprise Server 2010, SharePoint Server 2010, Web Applications, Office Web Apps Server 2010 and 2013, Word Viewer, Word 2007, 2010, 2013 and 2016, Word Automation Services, and Office Online Server allow remote code execution when the software fails to properly handle objects in memory.
Weakness: CWE-119.
Severity
7.8 high
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Mar 3, 2022
Federal due date Mar 24, 2022
EPSS, next 30 days
82%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
Microsoft Office. NVD's record lists the exact affected versions.
References
- 0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html Exploit
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826 PatchVendor Advisory
- securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/ Broken LinkTechnical DescriptionThird Party Advisory
- www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/ ExploitThird Party Advisory
- 0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html Exploit
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826 PatchVendor Advisory
- securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/ Broken LinkTechnical DescriptionThird Party Advisory
- www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/ ExploitThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826 US Government Resource
Questions
Is CVE-2017-11826 being exploited?
Yes. CISA added CVE-2017-11826 to its Known Exploited Vulnerabilities catalog on 2022-03-03, with a federal remediation due date of 2022-03-24.
How do I fix CVE-2017-11826?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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