CVE-2026-20431
In Modem, there is a possible system crash due to a logic error.
Published Apr 7, 2026 · corrected/updated Jul 24, 2026 · mediatek mt6813 firmware · evidence confidence high
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.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-20431 is a medium public vulnerability record for mediatek mt6813 firmware. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether mediatek mt6813 firmware is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: mediatek/mt6813 firmware; mediatek/mt6815 firmware; mediatek/mt6835 firmware; mediatek/mt6878 firmware. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 6.5, EPSS 0.3%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-770. Sources contributing to this record: cve_org, epss, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Apr 7, 2026 · NIST NVD
Detected
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.
Jul 24, 2026 · NIST NVD
Updated
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.
Affected
- cpe mediatek/mt6813 firmwareversion unspecified
- cpe mediatek/mt6815 firmwareversion unspecified
- cpe mediatek/mt6835 firmwareversion unspecified
- cpe mediatek/mt6878 firmwareversion unspecified
- cpe mediatek/mt6897 firmwareversion unspecified
- cpe mediatek/mt6899 firmwareversion unspecified
- cpe mediatek/mt6986 firmwareversion unspecified
- cpe mediatek/mt6991 firmwareversion unspecified
- cpe mediatek/mt6993 firmwareversion unspecified
- cpe mediatek/mt8668 firmwareversion unspecified
- cpe mediatek/mt8676 firmwareversion unspecified
- cpe mediatek/mt8678 firmwareversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-20431
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-20431
30-day exploitation probability 0.3%
first.org - NIST NVDVulnerability recordCVE-2026-20431
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.
nvd.nist.gov