Out-of-bounds write in MediaTek, Inc. MediaTek Chipset
CVSS score
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EPSS probability
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Risk score
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Published
3 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%61
Short explanation
CVE-2026-20554 is an out-of-bounds write in MediaTek chipset modem code that can cause a system crash and enable remote privilege escalation when a UE connects to a rogue base station. Exploitation requires user interaction and no additional execution privileges.
Remote escalation to root can compromise device integrity and affect telecom services.
What should be done?
- Monitor MediaTek security bulletins for patch releases
- Apply firmware updates when available
- Restrict connections to trusted base stations
- Implement network-level detection of rogue stations
The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.
Chain of evidence and sources
CVE-2026-20554, MediaTek çipset modeminde sınır kontrolünün eksikliği nedeniyle uzaktan yetki yükseltmeye izin verir.
Bu zafiyet için CISA KEV programında aktif istismar raporu bulunmamaktadır.
Yama durumu resmi kaynaklarda doğrulanamadı; mevcut yama hakkında kesin bir bilgi yoktur.
Show the technical text from the sources
In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY01911177; Issue ID: MSV-10122.
CWE: CWE-787
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-20554 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | MediaTek, Inc. | MediaTek chipset | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-20554 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-20554 weaknesses.
Official Sources and Advisories
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Weakness Type (CWE & CAPEC)
Similar Vulnerabilities
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