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CVE-2026-20504 (GCVE-0-2026-20504)

Vulnerability from cvelistv5 – Published: 2026-09-07 01:57 – Updated: 2026-09-07 10:36
VLAI
Summary
In Modem, there is a possible system crash due to a missing bounds check. 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: MOLY00755024; Issue ID: MSV-7865.
Severity
5.3 (Medium)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-07 10:36 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
MediaTek, Inc. MediaTek chipset Affected: MT2735
Affected: MT6833
Affected: MT6853
Affected: MT6855
Affected: MT6873
Affected: MT6875
Affected: MT6877
Affected: MT6880
Affected: MT6883
Affected: MT6885
Affected: MT6889
Affected: MT6890
Affected: MT6891
Affected: MT6893
Affected: MT8675
Affected: MT8771
Affected: MT8791
Affected: MT8791T
Affected: MT8797
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  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.