Local system crash via improper certificate validation
Published Sep 7, 2026 · Updated Sep 7, 2026
Improper certificate validation in MediaTek Chipset modem components allows local users to crash the system through crafted input. The modem improperly validates certificate-related input, but MediaTek has not disclosed the specific parser, field, or failed check. Exploitation requires User execution privileges and user interaction, and the documented consequence is a system crash rather than code execution or data access.
Summary
What happened
Improper certificate validation in MediaTek Chipset modem components allows local users to crash the system through crafted input. The modem improperly validates certificate-related input, but MediaTek has not disclosed the specific parser, field, or failed check. Exploitation requires User execution privileges and user interaction, and the documented consequence is a system crash rather than code execution or data access.
The record
- CVE
- CVE-2026-20500
- Published
- Sep 7, 2026
- Updated
- Sep 7, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-295, T1499
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 7, 2026CVE publishedPublication date reported by the CVE source.
- Sep 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=MT2716
- Affected versionversion=MT6835
- Affected versionversion=MT6858
- Affected versionversion=MT6878
- Affected versionversion=MT6881
- Affected versionversion=MT6897
- Affected versionversion=MT6899
- Affected versionversion=MT6982VB
- Affected versionversion=MT6986
- Affected versionversion=MT6988
- Affected versionversion=MT6991
- Affected versionversion=MT6993
- Affected versionversion=MT8668
- Affected versionversion=MT8676
- Affected versionversion=MT8678
- Affected versionversion=MT8755
- Affected versionversion=MT8775
- Affected versionversion=MT8792
- Affected versionversion=MT8793
- Affected versionversion=MT8863
- Affected versionversion=MT8873
- Affected versionversion=MT8883
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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