Microsoft Azure Service Fabric Runtime link following
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 5.6 | $0-$5k | 0.00 |
Summary
A vulnerability was found in Microsoft Azure Service Fabric. It has been rated as critical. This affects an unknown part of the component Runtime. This manipulation causes link following. This vulnerability is tracked as CVE-2025-21195. The attack is restricted to local execution. No exploit exists. To fix this issue, it is recommended to deploy a patch.
Details
A vulnerability has been found in Microsoft Azure Service Fabric (version unknown) and classified as critical. Affected by this vulnerability is an unknown function of the component Runtime. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect integrity, and availability. The summary by CVE is:
Improper link resolution before file access ('link following') in Service Fabric allows an authorized attacker to elevate privileges locally.
The weakness was disclosed 07/08/2025 as confirmed security update guide (Website). It is possible to read the advisory at msrc.microsoft.com. This vulnerability is known as CVE-2025-21195. The exploitation appears to be difficult. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/23/2025).
Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Product
Type
Vendor
Name
License
Website
- Vendor: https://www.microsoft.com/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.1VulDB Meta Temp Score: 5.6
VulDB Base Score: 6.3
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍
Vendor Base Score (Microsoft): 6.0
Vendor Vector (Microsoft): 🔒
CNA Base Score: 6.0
CNA Vector (Microsoft): 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Link followingCWE: CWE-59
CAPEC: 🔒
ATT&CK: 🔒
Physical: Partially
Local: Yes
Remote: Partially
Availability: 🔒
Status: Unproven
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
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Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒
Timeline
07/08/2025 VulDB entry created07/08/2025 Advisory disclosed
07/08/2025 Countermeasure disclosed
07/23/2025 VulDB entry last update
Sources
Vendor: microsoft.comAdvisory: msrc.microsoft.com
Status: Confirmed
CVE: CVE-2025-21195 (🔒)
GCVE (CVE): GCVE-0-2025-21195
GCVE (VulDB): GCVE-100-315427
Entry
Created: 07/08/2025 19:03Updated: 07/23/2025 00:57
Changes: 07/08/2025 19:03 (34), 07/08/2025 19:06 (35), 07/23/2025 00:57 (13)
Complete: 🔍
Cache ID: 216::103
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
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