CVE-2026-20457 (GCVE-0-2026-20457)

Vulnerability from cvelistv5 – Published: 2026-07-01 03:13 – Updated: 2026-07-01 10:40
VLAI
Summary
In Modem, there is a possible system crash due to improper input validation. 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: MOLY01826924; Issue ID: MSV-7301.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 10:40 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Impacted products
Vendor Product Version CPE status
MediaTek, Inc. MediaTek chipset Affected: MT2735
Affected: MT2737
Affected: MT6739
Affected: MT6761
Affected: MT6762
Affected: MT6763
Affected: MT6765
Affected: MT6767
Affected: MT6768
Affected: MT6769
Affected: MT6771
Affected: MT6779
Affected: MT6781
Affected: MT6783
Affected: MT6785
Affected: MT6789
Affected: MT6833
Affected: MT6853
Affected: MT6855
Affected: MT6873
Affected: MT6875
Affected: MT6877
Affected: MT6879
Affected: MT6880
Affected: MT6883
Affected: MT6885
Affected: MT6886
Affected: MT6889
Affected: MT6890
Affected: MT6891
Affected: MT6893
Affected: MT6895
Affected: MT6896
Affected: MT6980
Affected: MT6983
Affected: MT6985
Affected: MT6989
Affected: MT6990
Affected: MT8666
Affected: MT8667
Affected: MT8673
Affected: MT8675
Affected: MT8765
Affected: MT8766
Affected: MT8766R
Affected: MT8768
Affected: MT8771
Affected: MT8781
Affected: MT8786
Affected: MT8788
Affected: MT8788E
Affected: MT8789
Affected: MT8791
Affected: MT8791T
Affected: MT8795T
Affected: MT8796
Affected: MT8797
Affected: MT8798
Affected: MT8893
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                },
                {
                  "status": "affected",
                  "version": "MT8786"
                },
                {
                  "status": "affected",
                  "version": "MT8788"
                },
                {
                  "status": "affected",
                  "version": "MT8788E"
                },
                {
                  "status": "affected",
                  "version": "MT8789"
                },
                {
                  "status": "affected",
                  "version": "MT8791"
                },
                {
                  "status": "affected",
                  "version": "MT8791T"
                },
                {
                  "status": "affected",
                  "version": "MT8795T"
                },
                {
                  "status": "affected",
                  "version": "MT8796"
                },
                {
                  "status": "affected",
                  "version": "MT8797"
                },
                {
                  "status": "affected",
                  "version": "MT8798"
                },
                {
                  "status": "affected",
                  "version": "MT8893"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In Modem, there is a possible system crash due to improper input validation. 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: MOLY01826924; Issue ID: MSV-7301."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-476",
                  "description": "CWE-476 NULL Pointer Dereference",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-01T03:13:58.305Z",
            "orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
            "shortName": "MediaTek"
          },
          "references": [
            {
              "url": "https://corp.mediatek.com/product-security-bulletin/July-2026"
            }
          ],
          "x_generator": {
            "engine": "cvelib 1.8.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374",
        "assignerShortName": "MediaTek",
        "cveId": "CVE-2026-20457",
        "datePublished": "2026-07-01T03:13:58.305Z",
        "dateReserved": "2025-11-03T01:30:59.014Z",
        "dateUpdated": "2026-07-01T10:40:26.558Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.

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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.


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