MediaTek MT2735 Modem NR15 Base Station assertion

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in MediaTek MT2735, MT6833, MT6833P, MT6853, MT6853T, MT6855, MT6855T, MT6873, MT6875, MT6875T, MT6877, MT6877T, MT6877TT, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893 and MT8791T Modem NR15. It has been rated as critical. The affected element is an unknown function of the component Base Station Handler. The manipulation leads to assertion. This vulnerability is uniquely identified as CVE-2025-20792. The attack is possible to be carried out remotely. No exploit exists. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in MediaTek MT2735, MT6833, MT6833P, MT6853, MT6853T, MT6855, MT6855T, MT6873, MT6875, MT6875T, MT6877, MT6877T, MT6877TT, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893 and MT8791T Modem NR15 and classified as critical. This issue affects an unknown function of the component Base Station Handler. The manipulation with an unknown input leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability. The summary by CVE is:

In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01717526; Issue ID: MSV-5591.

The advisory is shared at corp.mediatek.com. The identification of this vulnerability is CVE-2025-20792 since 11/01/2024. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

Applying the patch MSV-5591 is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2025-2711). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Lenovo BIOS
Lenovo Computer
Google Android

Productinfo

Type

Chip Software

Vendor

MediaTek

Name

Version

Modem NR15

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Assertion
CWE: CWE-617
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: MSV-5591

Timelineinfo

11/01/2024 CVE reserved
12/02/2025 +396 days Advisory disclosed
12/02/2025 +0 days VulDB entry created
12/19/2025 +17 days VulDB entry last update

Sourcesinfo

Advisory: MSV-5591
Status: Confirmed

CVE: CVE-2025-20792 (🔒)
GCVE (CVE): GCVE-0-2025-20792
GCVE (VulDB): GCVE-100-333977
CERT Bund: WID-SEC-2025-2711 - Android Patchday Dezember 2025: Mehrere Schwachstellen

Entryinfo

Created: 12/02/2025 07:54
Updated: 12/19/2025 02:02
Changes: 12/02/2025 07:54 (56), 12/19/2025 02:02 (7)
Complete: 🔍
Cache ID: 216::103

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