HOMEVULNERABILITIESCVE-2026-20431
MEDIUM

CVE-2026-20431

CWE-770Published: April 7, 2026· Updated: Apr 10, 2026

6.5
CVSS v3.1
EPSS:0.08%probability of exploitation in 30 daysPercentile:23.6th

Official Description

In Modem, there is a possible system crash due to a logic error. 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: MOLY01106496; Issue ID: MSV-4467.

NVD Source

Technical Analysis

CVE-2026-20431 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

mediatek38 products
mt6813 firmwaremt6813mt6815 firmwaremt6815mt6835 firmwaremt6835mt6878 firmwaremt6878mt6897 firmwaremt6897mt6899 firmwaremt6899+26 more
Source: NVD CPE · 38 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://corp.mediatek.com/product-security-bulletin/April-2026

All References (1)

→
https://corp.mediatek.com/product-security-bulletin/April-2026Vendor Advisory

Quick Facts

CVE IDCVE-2026-20431
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-770
CISA KEVNo
EPSS (30d)0.08%
Affected1 vendor
PublishedApr 7, 2026

Related CVEs (CWE-770)

CVE-2026-12818
9.3
CVE-2026-42786
8.7
CVE-2026-35469
8.7
CVE-2026-32145
8.7
CVE-2026-43973
8.7
CVE-2026-48854
8.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-20431 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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