Zyxel USG FLEX H uOS up to V1.31 Configuration File privileges management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Zyxel USG FLEX H uOS up to V1.31. It has been classified as critical. Impacted is an unknown function of the component Configuration File Handler. The manipulation leads to privileges management. This vulnerability is traded as CVE-2025-1732. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Zyxel USG FLEX H uOS up to V1.31. This issue affects an unknown code block of the component Configuration File Handler. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An improper privilege management vulnerability in the recovery function of the Zyxel USG FLEX H series uOS firmware version V1.31 and earlier could allow an authenticated local attacker with administrator privileges to upload a crafted configuration file and escalate privileges on a vulnerable device.

The advisory is shared at zyxel.com. The identification of this vulnerability is CVE-2025-1732 since 02/27/2025. The exploitation is known to be easy. An attack has to be approached locally. Additional levels of successful authentication are needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/31/2025). MITRE ATT&CK project uses the attack technique T1068 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-12335). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.7
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.7
CNA Vector (Zyxel): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/27/2025 🔍
04/22/2025 +53 days 🔍
04/22/2025 +0 days 🔍
10/31/2025 +192 days 🔍

Sourcesinfo

Vendor: zyxel.com

Advisory: zyxel.com
Status: Confirmed

CVE: CVE-2025-1732 (🔍)
GCVE (CVE): GCVE-0-2025-1732
GCVE (VulDB): GCVE-100-305849
EUVD: 🔍

Entryinfo

Created: 04/22/2025 09:39
Updated: 10/31/2025 03:35
Changes: 04/22/2025 09:39 (62), 04/22/2025 15:19 (1), 06/12/2025 11:42 (1), 10/31/2025 03:35 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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