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CVE-2026-20522· CVE.org (no NVD analysis yet)· CNA MediaTek

In neuropilot, there is a possible out of bounds write due to a missing bounds check.

In neuropilot, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11249050; Issue ID: MSV-9172.

HighCVSS 8.4 · v3.1—No exploit No fix recorded
Published
Oct 5, 2026
Updated
Oct 6, 2026
EPSS
0.1% · 2th percentile
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Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (MediaTek). Independent of NVD's CPE analysis and usually ahead of it.

  • MediaTek, Inc. MediaTek chipset

    • MT6881, MT6993, MT8188, MT8189, MT8668, MT8781, MT8875, MT8910affected

Same product

mediatek, inc.: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-20586In vdec, there is a possible out of bounds write due to a missing bounds check.
    35Monitor
  • CVE-2026-20531In apu, there is a possible memory corruption due to use after free.
    33Monitor
  • CVE-2026-20524In apu, there is a possible memory corruption due to improper input validation.
    33Monitor
  • CVE-2026-20523In neuropilot, there is a possible out of bounds write due to a missing bounds check.
    33Monitor
  • CVE-2026-20521In Video HAL, there is a possible escalation of privilege due to a missing bounds check.
    33Monitor
  • CVE-2026-20465In wlan AP driver, there is a possible out of bounds write due to a missing bounds check.
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-205860 days apartIn vdec, there is a possible out of bounds write due to a missing bounds check.
    35Monitor
  • CVE-2026-205230 days apartIn neuropilot, there is a possible out of bounds write due to a missing bounds check.
    33Monitor
  • CVE-2026-205190 days apartIn Modem, there is a possible out of bounds write due to a missing bounds check.
    30Monitor
  • CVE-2026-205200 days apartIn Modem, there is a possible out of bounds write due to a missing bounds check.
    30Monitor
  • CVE-2026-205260 days apartIn Modem, there is a possible out of bounds write due to a missing bounds check.
    30Monitor
  • CVE-2026-2045896 days apartIn Modem, there is a possible memory corruption due to a missing bounds check.
    30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. CVSS— → 8.4
  2. Severity— → high
  3. SSVC exploitation— → none
  4. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records