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01 Record

CVE-2026-20462

In Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User

MediumPUBLISHEDCNA: MediaTek
CNA base score6.7 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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02 Description

In Telephony, there is a possible memory corruption due to a heap buffer overflow. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.15% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 5.0% of scored records. A rank, not a probability.
NVD base score
6.7 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Deferred. NVD last modified this record on 2026-10-25.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-01 03:14Z4 MO AGO
Last updated
2026-07-02 03:55Z3 MO AGO
Reserved
2025-11-03
Assigning CNA
MediaTek
Record state
PUBLISHED
Severity
Medium (CVSS 6.7)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-122Heap-based Buffer OverflowVariant
Data version
5.2
Document digest
a9e7fd2309618dc9552fe532b3cb8aaf9815b38f3dd839e477743db7bf0c726e

05 Affected products

VendorProductVersionsPlatforms
MediaTek, Inc.MediaTek chipsetMT6739, MT6761, MT6765, MT6768, MT6781, MT6789, MT6833, MT6853, MT6855, MT6877, MT6883, MT6885, MT6889, MT6893, MT8695, MT8696, MT8765, MT8766, MT8766R, MT8768, MT8781, MT8791—

06 References