CVE-2026-20534

MEDIUM
5.3
CVSS Score
Published: October 5, 2026 at 01:40 AM UTC
Updated: October 9, 2026 at 02:36 PM UTC
84 products affected across 2 vendorsMT6991 FirmwareMT8668 FirmwareMT6993 Firmware· also runs on 83 platforms

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In Modem, there is a possible out of bounds read due to an incorrect 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: MOLY01797547; Issue ID: MSV-9155.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

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mediatek-mt2716 (same device)
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mediatek-mt2735 (same device)
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mediatek-mt2737 (same device)
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mediatek-mt6739 (same device)
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mediatek-mt6761 (same device)
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mediatek-mt6762 (same device)
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mediatek-mt6763 (same device)
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mediatek-mt6765 (same device)
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mediatek-mt6767 (same device)
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mediatek-mt6768 (same device)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCISA-ADP
Attack Vector
ADJACENT_NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

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