CVE-2020-16921
Windows Text Services Framework Information Disclosure Vulnerability
<p>An information disclosure vulnerability exists in Text Services Framework when it fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could potentially read data that was not intended to be disclosed. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.</p> <p>To exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file.</p> <p>The update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.</p>
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Windows Text Services Framework Information Disclosure Vulnerability
<p>An information disclosure vulnerability exists in Text Services Framework when it fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could potentially read data that was not intended to be disclosed. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.</p> <p>To exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file.</p> <p>The update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.</p>
- Record
CVE-2020-16921- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2020-8879
<p>An information disclosure vulnerability exists in Text Services Framework when it fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could potentially read data that was not intended to be disclosed. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.</p> <p>To exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file.</p> <p>The update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.</p>
- Record
EUVD-2020-8879- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fhp5-9cvf-c86x
An information disclosure vulnerability exists in Text Services Framework when it fails to...
An information disclosure vulnerability exists in Text Services Framework when it fails to properly handle objects in memory, aka 'Windows Text Services Framework Information Disclosure Vulnerability'.
- Record
GHSA-fhp5-9cvf-c86x- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-119
- Updated
- 2026-11-02
NVD
<p>An information disclosure vulnerability exists in Text Services Framework when it fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could potentially read data that was not intended to be disclosed. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.</p> <p>To exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file.</p> <p>The update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.</p>
- Record
CVE-2020-16921- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
Affected products
- microsoft windows 10 version 1709
- microsoft windows 10 version 1709 for 32-bit systems
- microsoft windows 10 version 1803
- microsoft windows 10 version 1809
- microsoft windows 10 version 1903 for 32-bit systems
- microsoft windows 10 version 1903 for arm64-based systems
- microsoft windows 10 version 1903 for x64-based systems
- microsoft windows 10 version 1909
- microsoft windows 10 version 2004
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server version 2004
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-16921 is a medium vulnerability (CVSS 5.5) in Microsoft Windows 10 Version 1709, published October 16, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.25%, the 69th percentile. No source names a fixed version.