CWE-591 (Sensitive Data Storage in Improperly Locked Memory) documents a weakness type used across vulnerability databases and security assessments. Use the sections below for definition, context, and mapped CVEs.
The product stores sensitive data in memory that is not locked, or that has been incorrectly locked, which might cause the memory to be written to swap files on disk by the virtual memory manager. This can make the data more accessible to external actors.
| Kind | Name | Class | Prevalence | OS / CPE |
|---|---|---|---|---|
| language | — | Not Language-Specific | Undetermined | — |
These CVEs are mapped to this weakness in this database and kept for traceability and search.
| CVE | Published | Summary |
|---|---|---|
| CVE-2025-11711 | 2025-10-14 | There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderb… |
| CVE-2025-48819 | 2025-07-08 | Sensitive data storage in improperly locked memory in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges over an adjacent network. |
| CVE-2025-30394 | 2025-05-13 | Sensitive data storage in improperly locked memory in Remote Desktop Gateway Service allows an unauthorized attacker to deny service over a network. |
| CVE-2025-27732 | 2025-04-08 | Sensitive data storage in improperly locked memory in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. |
| CVE-2025-27484 | 2025-04-08 | Sensitive data storage in improperly locked memory in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges over a network. |
| CVE-2025-27482 | 2025-04-08 | Sensitive data storage in improperly locked memory in Remote Desktop Gateway Service allows an unauthorized attacker to execute code over a network. |
| CVE-2025-27475 | 2025-04-08 | Sensitive data storage in improperly locked memory in Windows Update Stack allows an authorized attacker to elevate privileges locally. |
| CVE-2025-27471 | 2025-04-08 | Sensitive data storage in improperly locked memory in Microsoft Streaming Service allows an unauthorized attacker to deny service over a network. |
| CVE-2025-26686 | 2025-04-08 | Sensitive data storage in improperly locked memory in Windows TCP/IP allows an unauthorized attacker to execute code over a network. |
| CVE-2025-26671 | 2025-04-08 | Use after free in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network. |
| CVE-2025-26665 | 2025-04-08 | Sensitive data storage in improperly locked memory in Windows upnphost.dll allows an authorized attacker to elevate privileges locally. |
| CVE-2025-26648 | 2025-04-08 | Sensitive data storage in improperly locked memory in Windows Kernel allows an authorized attacker to elevate privileges locally. |
| CVE-2025-24045 | 2025-03-11 | Sensitive data storage in improperly locked memory in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network. |
| CVE-2025-24035 | 2025-03-11 | Sensitive data storage in improperly locked memory in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network. |
| CVE-2025-21309 | 2025-01-14 | Windows Remote Desktop Services Remote Code Execution Vulnerability |
| CVE-2025-21294 | 2025-01-14 | Microsoft Digest Authentication Remote Code Execution Vulnerability |
| CVE-2025-21224 | 2025-01-14 | Windows Line Printer Daemon (LPD) Service Remote Code Execution Vulnerability |
| CVE-2024-49132 | 2024-12-12 | Windows Remote Desktop Services Remote Code Execution Vulnerability |
| CVE-2024-49128 | 2024-12-12 | Sensitive data storage in improperly locked memory in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network. |
| CVE-2024-49126 | 2024-12-12 | Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability |
| Date | Name | Version | Importance | Comment |
|---|---|---|---|---|
| 2008-07-01 | Eric Dalci | 1.0 | — | updated Time_of_Introduction |
| 2008-09-08 | CWE Content Team | 1.0 | — | updated Common_Consequences, Relationships, Other_Notes, Taxonomy_Mappings |
| 2008-11-24 | CWE Content Team | 1.1 | — | updated Relationships, Taxonomy_Mappings |
| 2009-05-27 | CWE Content Team | 1.4 | — | updated Description, Other_Notes |
| 2011-06-01 | CWE Content Team | 1.13 | — | updated Common_Consequences |
| 2011-09-13 | CWE Content Team | 2.1 | — | updated Relationships, Taxonomy_Mappings |
| 2012-05-11 | CWE Content Team | 2.2 | — | updated Relationships |
| 2014-07-30 | CWE Content Team | 2.8 | — | updated Relationships, Taxonomy_Mappings |
| 2017-11-08 | CWE Content Team | 3.0 | — | updated Relationships, Taxonomy_Mappings |
| 2020-02-24 | CWE Content Team | 4.0 | — | updated Relationships |
| 2023-01-31 | CWE Content Team | 4.10 | — | updated Description |
| 2023-04-27 | CWE Content Team | 4.11 | — | updated Relationships |
| 2023-06-29 | CWE Content Team | 4.12 | — | updated Mapping_Notes |
| 2025-12-11 | CWE Content Team | 4.19 | — | updated Applicable_Platforms, Weakness_Ordinalities |
| 2026-04-30 | CWE Content Team | 4.20 | — | updated Observed_Examples |