CVE-2026-20433 (GCVE-0-2026-20433)

Vulnerability from cvelistv5 – Published: 2026-04-07 03:25 – Updated: 2026-04-08 03:55
VLAI?
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: MOLY01088681; Issue ID: MSV-4460.
Severity ?
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
MediaTek, Inc. MediaTek chipset Affected: MT2735
Affected: MT2737
Affected: MT6813
Affected: MT6833
Affected: MT6833P
Affected: MT6835
Affected: MT6835T
Affected: MT6853
Affected: MT6853T
Affected: MT6855
Affected: MT6855T
Affected: MT6873
Affected: MT6875
Affected: MT6875T
Affected: MT6877
Affected: MT6877T
Affected: MT6877TT
Affected: MT6878
Affected: MT6878M
Affected: MT6879
Affected: MT6880
Affected: MT6883
Affected: MT6885
Affected: MT6886
Affected: MT6889
Affected: MT6890
Affected: MT6891
Affected: MT6893
Affected: MT6895
Affected: MT6895TT
Affected: MT6896
Affected: MT6897
Affected: MT6899
Affected: MT6980
Affected: MT6980D
Affected: MT6983
Affected: MT6983T
Affected: MT6985
Affected: MT6985T
Affected: MT6989
Affected: MT6989T
Affected: MT6990
Affected: MT6991
Affected: MT8668
Affected: MT8673
Affected: MT8675
Affected: MT8676
Affected: MT8678
Affected: MT8755
Affected: MT8771
Affected: MT8775
Affected: MT8791
Affected: MT8791T
Affected: MT8792
Affected: MT8793
Affected: MT8795T
Affected: MT8797
Affected: MT8798
Affected: MT8863
Affected: MT8873
Affected: MT8883
Affected: MT8893
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.8, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20433\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-07T13:01:18.631553Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-07T13:01:12.942Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"MediaTek, Inc.\", \"product\": \"MediaTek chipset\", \"versions\": [{\"status\": \"affected\", \"version\": \"MT2735\"}, {\"status\": \"affected\", \"version\": \"MT2737\"}, {\"status\": \"affected\", \"version\": \"MT6813\"}, {\"status\": \"affected\", \"version\": \"MT6833\"}, {\"status\": \"affected\", \"version\": \"MT6833P\"}, {\"status\": \"affected\", \"version\": \"MT6835\"}, {\"status\": \"affected\", \"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\": \"MT8668\"}, {\"status\": \"affected\", \"version\": \"MT8673\"}, {\"status\": \"affected\", \"version\": \"MT8675\"}, {\"status\": \"affected\", \"version\": \"MT8676\"}, {\"status\": \"affected\", \"version\": \"MT8678\"}, {\"status\": \"affected\", \"version\": \"MT8755\"}, {\"status\": \"affected\", \"version\": \"MT8771\"}, {\"status\": \"affected\", \"version\": \"MT8775\"}, {\"status\": \"affected\", \"version\": \"MT8791\"}, {\"status\": \"affected\", \"version\": \"MT8791T\"}, {\"status\": \"affected\", \"version\": \"MT8792\"}, {\"status\": \"affected\", \"version\": \"MT8793\"}, {\"status\": \"affected\", \"version\": \"MT8795T\"}, {\"status\": \"affected\", \"version\": \"MT8797\"}, {\"status\": \"affected\", \"version\": \"MT8798\"}, {\"status\": \"affected\", \"version\": \"MT8863\"}, {\"status\": \"affected\", \"version\": \"MT8873\"}, {\"status\": \"affected\", \"version\": \"MT8883\"}, {\"status\": \"affected\", \"version\": \"MT8893\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://corp.mediatek.com/product-security-bulletin/April-2026\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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: MOLY01088681; Issue ID: MSV-4460.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"ee979b05-11f8-4f25-a7e0-a1fa9c190374\", \"shortName\": \"MediaTek\", \"dateUpdated\": \"2026-04-07T03:25:32.066Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-20433\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-08T03:55:26.543Z\", \"dateReserved\": \"2025-11-03T01:30:59.011Z\", \"assignerOrgId\": \"ee979b05-11f8-4f25-a7e0-a1fa9c190374\", \"datePublished\": \"2026-04-07T03:25:32.066Z\", \"assignerShortName\": \"MediaTek\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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  • 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.