CVE-2025-54899High
MSR
MSR
Microsoft Security Response Center
The Security Update Guide is the source of truth for vulnerabilities in Microsoft products — KB article numbers, impacted builds and replacement patches. MSRC also assigns the MSRC-specific exploitability index used alongside CVSS.
Region
US
Updates
Patch Tuesday + ad-hoc
License
Proprietary
Microsoft's Security Update Guide, covering Windows, Office, Azure, SQL Server, Exchange and other first-party products.
https://msrc.microsoft.com/update-guide →Share link
Anyone with the link can open this vulnerability.
Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVSS
7.8
High
EPSS
0.01
p41
Published
2025-01-01
Updated
2025-01-01
Description
Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Tags · CWE
CWE-590
CWE-590VariantIncomplete
Free of Memory not on the Heap
The product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc().
https://cwe.mitre.org/data/definitions/590.html →Open in CWE collection →Affected products
365_appsExcelOfficeOffice_long_term_servicing_channel
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Timeline
2025-01-01
Published
2025-01-01
Updated
CVSS 3.1 breakdown
Attack Vector
AV: L
Local (L)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: R
Required (R)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.005 · p41
Known exploited (KEV)
No
Known exploits — Сканер-ВС
No Сканер-ВС checks registered for this vulnerability yet.
Affected products
| Product | Vendor | Status |
|---|---|---|
| 365_apps | * | Tracked |
| excel | * | Tracked |
| office | * | Tracked |
| office_long_term_servicing_channel | * | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
| Windows | Microsoft | Tracked |
Source databases
MSR
MSR
Microsoft Security Response Center
The Security Update Guide is the source of truth for vulnerabilities in Microsoft products — KB article numbers, impacted builds and replacement patches. MSRC also assigns the MSRC-specific exploitability index used alongside CVSS.
Region
US
Updates
Patch Tuesday + ad-hoc
License
Proprietary
Microsoft's Security Update Guide, covering Windows, Office, Azure, SQL Server, Exchange and other first-party products.
https://msrc.microsoft.com/update-guide →CVE
CVE
National Vulnerability Database
NVD is the U.S. government repository of standards-based vulnerability management data, built on top of the MITRE CVE list. Every record includes CPE applicability statements, CVSS v2 and v3.x base scores, CWE mappings and cross-references to advisories.
Region
US
Updates
15 min
License
Public Domain
Comprehensive catalog of publicly disclosed vulnerabilities with CPE matches, CVSS scoring and reference URLs. De-facto standard for cross-vendor correlation.
https://nvd.nist.gov →Related vulnerabilities
External references