CVE-2025-47987
published 2025-07-08CVE-2025-47987: Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elevate privileges locally.
PriorityP357high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EXPLOIT
EPSS
1.68%
74.3th percentile
Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elevate privileges locally.
Affected
47 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1507 | < 10.0.10240.21073 | 10.0.10240.21073 |
| microsoft | windows_10_1607 | < 10.0.14393.8246 | 10.0.14393.8246 |
| microsoft | windows_10_1809 | < 10.0.17763.7558 | 10.0.17763.7558 |
| microsoft | windows_10_21h2 | < 10.0.19044.6093 | 10.0.19044.6093 |
| microsoft | windows_10_22h2 | < 10.0.19045.6093 | 10.0.19045.6093 |
| microsoft | windows_10_version_1507 | >= 10.0.10240.0 < 10.0.10240.21073 | 10.0.10240.21073 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.8246 | 10.0.14393.8246 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.7558 | 10.0.17763.7558 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.6093 | 10.0.19044.6093 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.6093 | 10.0.19045.6093 |
| microsoft | windows_11_22h2 | < 10.0.22621.5624 | 10.0.22621.5624 |
| microsoft | windows_11_23h2 | < 10.0.22631.5624 | 10.0.22631.5624 |
| microsoft | windows_11_24h2 | < 10.0.26100.4652 | 10.0.26100.4652 |
| microsoft | windows_11_version_22h2 | >= 10.0.22621.0 < 10.0.22621.5624 | 10.0.22621.5624 |
| microsoft | windows_11_version_22h3 | >= 10.0.22631.0 < 10.0.22631.5624 | 10.0.22631.5624 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.5624 | 10.0.22631.5624 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.4652 | 10.0.26100.4652 |
| microsoft | windows_server_2008 | — | — |
| microsoft | windows_server_2008_r2_service_pack_1 | >= 6.1.7601.0 < 6.1.7601.27820 | 6.1.7601.27820 |
| microsoft | windows_server_2008_service_pack_2 | >= 6.0.6003.0 < 6.0.6003.23418 | 6.0.6003.23418 |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012 | >= 6.2.9200.0 < 6.2.9200.25573 | 6.2.9200.25573 |
| microsoft | windows_server_2012_r2 | >= 6.3.9600.0 < 6.3.9600.22676 | 6.3.9600.22676 |
| microsoft | windows_server_2016 | < 10.0.14393.8246 | 10.0.14393.8246 |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.8246 | 10.0.14393.8246 |
Detection & IOCsextracted from sources · hover to see the quote
bytes↗
0x1337 at offset 0x38 in KerbCertLogon buffer
- →Alert on abnormally large or malformed KerbCertLogon authentication buffers submitted to the Windows CredSSP provider (secur32.lib / lsass.exe), particularly those containing oversized certificate blobs designed to trigger a heap overflow. ↗
- →A successful exploit results in SYSTEM privilege escalation; monitor for unexpected SYSTEM-level process creation spawned from non-SYSTEM parent processes on affected Windows versions, especially after CredSSP authentication calls. ↗
- →Microsoft rates this as 'Exploitation More Likely'; prioritize detection and patching on exposed Windows Server and Windows 10/11 endpoints where CredSSP is active (e.g., RDP/WinRM environments). ↗
- ·The exploit requires an already-authorized (local) attacker; this is a local privilege escalation, not a remote unauthenticated vector. Detection should focus on post-compromise lateral movement or insider-threat scenarios. ↗
- ·Zscaler coverage requires 'Advanced Threat Protection' and 'Advanced Cloud Sandbox' subscriptions to detect exploitation attempts against CVE-2025-47987. ↗
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_msrc7.8HIGH
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Microsoft
Credential Security Support Provider Protocol (CredSSP) Elevation of Privilege Vulnerability
vendor_msrc·2025-07-08·CVSS 7.8
CVE-2025-47987 [HIGH] CWE-122 Credential Security Support Provider Protocol (CredSSP) Elevation of Privilege Vulnerability
Credential Security Support Provider Protocol (CredSSP) Elevation of Privilege Vulnerability
Description: Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elevate privileges locally.
FAQ: What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Windows Cred SSProvider Protocol: Windows Cred SSProvider Protocol
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Elevation of Privilege
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely
Reference: https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5062557
Reference: https://support.microsoft.com/help
GHSA
GHSA-wj9j-7rf7-vx65: Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elevate privileges locally
ghsa_unreviewed·2025-07-08
CVE-2025-47987 [HIGH] CWE-122 GHSA-wj9j-7rf7-vx65: Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elevate privileges locally
Heap-based buffer overflow in Windows Cred SSProvider Protocol allows an authorized attacker to elevate privileges locally.
No detection rules found.
Qualys
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review | Qualys
blogs_qualys·2025-07-08
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review | Qualys
#### Table of Contents
- Microsoft Patch Tuesday for July 2025
- Adobe Patches for July 2025
- Zero-day Vulnerability Patched in July Patch Tuesday Edition
- Critical Severity Vulnerabilities Patched in July Patch Tuesday Edition
- Other Microsoft Vulnerability Highlights
- Microsoft Release Summary
- Discover and Prioritize Vulnerabilities inVulnerability Management, Detection & Response (VMDR)
- Rapid Response withPatch Management (PM)
- EVALUATE Vendor-Suggested Mitigation with Policy Audit
- Microsoft July 2025 Patch Tuesday Mitigations
- Qualys Monthly Webinar Series
With cybersecurity threats continuing to evolve, Microsoft’s July 2025 Patch Tuesday highlights the need for consistent patching — this month’s release includes key fixes for actively exploited vulnerabilities. Here’s a
Qualys
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review
blogs_qualys·2025-07-08
Microsoft and Adobe Patch Tuesday, July 2025 Security Update Review
## Table of Contents
Microsoft Patch Tuesday for July 2025
Adobe Patches for July 2025
Zero-day Vulnerability Patched in July Patch Tuesday Edition
Critical Severity Vulnerabilities Patched in July Patch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
Discover and Prioritize Vulnerabilities inVulnerability Management, Detection & Response (VMDR)
Rapid Response withPatch Management (PM)
EVALUATE Vendor-Suggested Mitigation with Policy Audit
Microsoft July 2025 Patch Tuesday Mitigations
Qualys Monthly Webinar Series
With cybersecurity threats continuing to evolve, Microsoft’s July 2025 Patch Tuesday highlights the need for consistent patching — this month’s release includes key fixes for actively exploited vulnerabilities. Here’s a quick breakdo
Zscaler
Zscaler protects against 6 new vulnerabilities | 07-08-2025
blogs_zscaler·CVSS 7.8
[HIGH] Zscaler protects against 6 new vulnerabilities | 07-08-2025
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2025-07-08
Published