CVE-2026-20434 (GCVE-0-2026-20434)
Vulnerability from cvelistv5
Published
2026-03-02 08:39
Modified
2026-03-30 13:05
CWE
Summary
In Modem, there is a possible out of bounds write 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: MOLY00782946; Issue ID: MSV-4135.
Impacted products
Vendor Product Version
MediaTek, Inc. MediaTek chipset Version: MT2735
Version: MT2737
Version: MT6739
Version: MT6761
Version: MT6762
Version: MT6762D
Version: MT6762M
Version: MT6763
Version: MT6765
Version: MT6765T
Version: MT6767
Version: MT6768
Version: MT6769
Version: MT6769K
Version: MT6769S
Version: MT6769T
Version: MT6769Z
Version: MT6771
Version: MT6779
Version: MT6781
Version: MT6783
Version: MT6785
Version: MT6785T
Version: MT6785U
Version: MT6789
Version: MT6833
Version: MT6833P
Version: MT6835
Version: MT6835T
Version: MT6853
Version: MT6853T
Version: MT6855
Version: MT6855T
Version: MT6873
Version: MT6875
Version: MT6875T
Version: MT6877
Version: MT6877T
Version: MT6877TT
Version: MT6878
Version: MT6878M
Version: MT6879
Version: MT6880
Version: MT6883
Version: MT6885
Version: MT6886
Version: MT6889
Version: MT6890
Version: MT6891
Version: MT6893
Version: MT6895
Version: MT6895TT
Version: MT6896
Version: MT6897
Version: MT6899
Version: MT6980
Version: MT6980D
Version: MT6983
Version: MT6983T
Version: MT6985
Version: MT6985T
Version: MT6989
Version: MT6989T
Version: MT6990
Version: MT6991
Version: MT8666
Version: MT8667
Version: MT8668
Version: MT8673
Version: MT8675
Version: MT8676
Version: MT8678
Version: MT8755
Version: MT8765
Version: MT8766
Version: MT8766R
Version: MT8768
Version: MT8771
Version: MT8781
Version: MT8786
Version: MT8788
Version: MT8788E
Version: MT8789
Version: MT8791
Version: MT8791T
Version: MT8792
Version: MT8793
Version: MT8795T
Version: MT8797
Version: MT8798
Version: MT8863
Version: MT8873
Version: MT8883
Version: MT8893
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Show details on NVD website


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            },
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              "version": "MT6835"
            },
            {
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              "version": "MT6835T"
            },
            {
              "status": "affected",
              "version": "MT6853"
            },
            {
              "status": "affected",
              "version": "MT6853T"
            },
            {
              "status": "affected",
              "version": "MT6855"
            },
            {
              "status": "affected",
              "version": "MT6855T"
            },
            {
              "status": "affected",
              "version": "MT6873"
            },
            {
              "status": "affected",
              "version": "MT6875"
            },
            {
              "status": "affected",
              "version": "MT6875T"
            },
            {
              "status": "affected",
              "version": "MT6877"
            },
            {
              "status": "affected",
              "version": "MT6877T"
            },
            {
              "status": "affected",
              "version": "MT6877TT"
            },
            {
              "status": "affected",
              "version": "MT6878"
            },
            {
              "status": "affected",
              "version": "MT6878M"
            },
            {
              "status": "affected",
              "version": "MT6879"
            },
            {
              "status": "affected",
              "version": "MT6880"
            },
            {
              "status": "affected",
              "version": "MT6883"
            },
            {
              "status": "affected",
              "version": "MT6885"
            },
            {
              "status": "affected",
              "version": "MT6886"
            },
            {
              "status": "affected",
              "version": "MT6889"
            },
            {
              "status": "affected",
              "version": "MT6890"
            },
            {
              "status": "affected",
              "version": "MT6891"
            },
            {
              "status": "affected",
              "version": "MT6893"
            },
            {
              "status": "affected",
              "version": "MT6895"
            },
            {
              "status": "affected",
              "version": "MT6895TT"
            },
            {
              "status": "affected",
              "version": "MT6896"
            },
            {
              "status": "affected",
              "version": "MT6897"
            },
            {
              "status": "affected",
              "version": "MT6899"
            },
            {
              "status": "affected",
              "version": "MT6980"
            },
            {
              "status": "affected",
              "version": "MT6980D"
            },
            {
              "status": "affected",
              "version": "MT6983"
            },
            {
              "status": "affected",
              "version": "MT6983T"
            },
            {
              "status": "affected",
              "version": "MT6985"
            },
            {
              "status": "affected",
              "version": "MT6985T"
            },
            {
              "status": "affected",
              "version": "MT6989"
            },
            {
              "status": "affected",
              "version": "MT6989T"
            },
            {
              "status": "affected",
              "version": "MT6990"
            },
            {
              "status": "affected",
              "version": "MT6991"
            },
            {
              "status": "affected",
              "version": "MT8666"
            },
            {
              "status": "affected",
              "version": "MT8667"
            },
            {
              "status": "affected",
              "version": "MT8668"
            },
            {
              "status": "affected",
              "version": "MT8673"
            },
            {
              "status": "affected",
              "version": "MT8675"
            },
            {
              "status": "affected",
              "version": "MT8676"
            },
            {
              "status": "affected",
              "version": "MT8678"
            },
            {
              "status": "affected",
              "version": "MT8755"
            },
            {
              "status": "affected",
              "version": "MT8765"
            },
            {
              "status": "affected",
              "version": "MT8766"
            },
            {
              "status": "affected",
              "version": "MT8766R"
            },
            {
              "status": "affected",
              "version": "MT8768"
            },
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            },
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            },
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            },
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            },
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            },
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            },
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            },
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            },
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            },
            {
              "status": "affected",
              "version": "MT8795T"
            },
            {
              "status": "affected",
              "version": "MT8797"
            },
            {
              "status": "affected",
              "version": "MT8798"
            },
            {
              "status": "affected",
              "version": "MT8863"
            },
            {
              "status": "affected",
              "version": "MT8873"
            },
            {
              "status": "affected",
              "version": "MT8883"
            },
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              "description": "CWE-787 Out-of-bounds Write",
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    "dateReserved": "2025-11-03T01:30:59.011Z",
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20434\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-02T13:37:44.413942Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-02T13:37:34.417Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"MediaTek, 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}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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