VDB-339637 · CVE-2025-20794 · WID-SEC-2026-0569

MediaTek MT8893 NR15/NR16/NR17/NR17R Modem stack-based overflow

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.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in MediaTek MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8673, MT8675, MT8676, MT8678, MT8755, MT8771, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883 and MT8893 NR15/NR16/NR17/NR17R. Affected by this issue is some unknown functionality of the component Modem. This manipulation causes stack-based overflow. This vulnerability is tracked as CVE-2025-20794. The attack is possible to be carried out remotely. No exploit exists. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in MediaTek MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8673, MT8675, MT8676, MT8678, MT8755, MT8771, MT8791, MT8791T, MT8792, MT8793, MT8795T, MT8797, MT8798, MT8863, MT8873, MT8883 and MT8893 NR15/NR16/NR17/NR17R and classified as critical. Affected by this vulnerability is an unknown code of the component Modem. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect 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: MOLY01689259 / MOLY01586470; Issue ID: MSV-4847.

The advisory is shared at corp.mediatek.com. This vulnerability is known as CVE-2025-20794 since 11/01/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0569). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Google Android

Productinfo

Type

Chip Software

Vendor

MediaTek

Name

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

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

ADP CISA Base Score: 6.5
ADP CISA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
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: 🔒

Timelineinfo

11/01/2024 CVE reserved
01/06/2026 +431 days Advisory disclosed
01/06/2026 +0 days VulDB entry created
03/09/2026 +62 days VulDB entry last update

Sourcesinfo

Advisory: corp.mediatek.com
Status: Confirmed

CVE: CVE-2025-20794 (🔒)
GCVE (CVE): GCVE-0-2025-20794
GCVE (VulDB): GCVE-100-339637
CERT Bund: WID-SEC-2026-0569 - Google Android: Mehrere Schwachstellen

Entryinfo

Created: 01/06/2026 03:16
Updated: 03/09/2026 14:19
Changes: 01/06/2026 03:16 (55), 02/17/2026 19:20 (11), 03/09/2026 14:19 (6)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.