Details of VAR-202602-0342

ID

VAR-202602-0342

CVE

CVE-2026-20421

TITLE

media tech's NR15 Out-of-bounds read vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2026-002647

DESCRIPTION

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: MOLY01738293; Issue ID: MSV-5922. ID teeth MOLY01738293 ,problem ID teeth MSV-5922 is.Information handled by the software will not be leaked to the outside. Information handled by the software will not be rewritten. In addition, the software may stop functioning completely. Furthermore, attacks that exploit this vulnerability will not affect other software

Trust: 1.62

sources: NVD: CVE-2026-20421 // JVNDB: JVNDB-2026-002647

AFFECTED PRODUCTS

vendor:	mediatek	model:	nr15	scope:	eq	version:	-	Trust: 1.0
vendor:	メディアテック	model:	nr15	scope:	eq	version:	-	Trust: 0.8
vendor:	メディアテック	model:	nr15	scope:	-	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2026-002647 // NVD: CVE-2026-20421

CVSS

SEVERITY

CVSSV2

CVSSV3

134c704f-9b21-4f2e-91b3-4a467353bcc0:	CVE-2026-20421
value:	HIGH
Trust: 1.0
OTHER:	JVNDB-2026-002647
value:	HIGH
Trust: 0.8

134c704f-9b21-4f2e-91b3-4a467353bcc0:	CVE-2026-20421
baseSeverity:	HIGH
baseScore:	7.5
vectorString:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	3.9
impactScore:	3.6
version:	3.1
Trust: 1.0
OTHER:	JVNDB-2026-002647
baseSeverity:	HIGH
baseScore:	7.5
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: JVNDB: JVNDB-2026-002647 // NVD: CVE-2026-20421

PROBLEMTYPE DATA

problemtype:	CWE-125	Trust: 1.0
problemtype:	Out-of-bounds read (CWE-125) [ others ]	Trust: 0.8

sources: JVNDB: JVNDB-2026-002647 // NVD: CVE-2026-20421

PATCH

title:

February 2026

url:

https://corp.mediatek.com/product-security-bulletin/February-2026

Trust: 0.8

sources: JVNDB: JVNDB-2026-002647

EXTERNAL IDS

db:	NVD	id:	CVE-2026-20421	Trust: 2.6
db:	JVNDB	id:	JVNDB-2026-002647	Trust: 0.8

sources: JVNDB: JVNDB-2026-002647 // NVD: CVE-2026-20421

REFERENCES

url:	https://corp.mediatek.com/product-security-bulletin/february-2026	Trust: 1.0
url:	https://nvd.nist.gov/vuln/detail/cve-2026-20421	Trust: 0.8

sources: JVNDB: JVNDB-2026-002647 // NVD: CVE-2026-20421

SOURCES

db:	JVNDB	id:	JVNDB-2026-002647
db:	NVD	id:	CVE-2026-20421

LAST UPDATE DATE

2026-02-12T23:31:07.308000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2026-002647	date:	2026-02-05T06:44:00
db:	NVD	id:	CVE-2026-20421	date:	2026-02-03T21:23:50.483

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2026-002647	date:	2026-02-05T00:00:00
db:	NVD	id:	CVE-2026-20421	date:	2026-02-02T09:15:57.257