Local disclosure of uninitialized memory
Published May 11, 2021 · Updated Aug 3, 2024
Information disclosure in Microsoft Excel and Office products allows local users to read uninitialized memory during file processing. Microsoft states only that uninitialized memory can be disclosed and has not published the affected parser, file structure, or faulty memory operation. Exploitation requires low-privileged local access, and the disclosed impact is limited to confidentiality with no integrity or availability effect.
Summary
What happened
Information disclosure in Microsoft Excel and Office products allows local users to read uninitialized memory during file processing. Microsoft states only that uninitialized memory can be disclosed and has not published the affected parser, file structure, or faulty memory operation. Exploitation requires low-privileged local access, and the disclosed impact is limited to confidentiality with no integrity or availability effect.
The record
- CVE
- CVE-2021-31174
- Published
- May 11, 2021
- Updated
- Aug 3, 2024
- Vendor
- Microsoft
- Product
- Microsoft Office 2016
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 11, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.0.0 <16.0.5161.1000
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo