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NVD / CVE Program· CNA MediaTek

CVE-2024-20040: In wlan firmware, there is a possible out of bounds write due to improper input validation.

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In wlan firmware, there is a possible out of bounds write due to improper input validation. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08360153 (for MT6XXX chipsets) / WCNCR00363530 (for MT79XX chipsets); Issue ID: MSV-979.

HighCVSS 8.8 · v3.1—No exploit No fix recorded
Published
Mar 31, 2024
Updated
Jun 17, 2026
EPSS
0.1% · 7th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-20040

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxfoundationyocto
rdkcentralrdk-b
googleandroid
linuxlinux kernel
openwrtopenwrt
mediatekmt2713
mediatekmt6580
mediatekmt6761
mediatekmt6762
mediatekmt6768
mediatekmt6781
mediatekmt6789

and 45 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • google android12.0
  • google android13.0
  • google android14.0
  • linux linux kernel4.19
  • linuxfoundation yocto3.3
  • linuxfoundation yocto4.0
  • openwrt openwrt19.07.0
  • openwrt openwrt21.02.0
  • rdkcentral rdk-b2022q3

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. MT2713, MT6580, MT6761, MT6762, MT6768, MT6781, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6983, MT6985,

    • Android 12.0, 13.0, 14.0 / Linux 4.19 / Yocto 3.3, 4.0 / OpenWrt 19.07, 21.02 / RDK-B 22Q3affected

Same product

linuxfoundation: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-20148In wlan STA FW, there is a possible out of bounds write due to improper input validation.
    39Monitor
  • CVE-2024-20080In gnss service, there is a possible escalation of privilege due to improper certificate validation.
    39Monitor
  • CVE-2024-25626Yocto Project Security Advisory - BitBake/Toaster
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2024-20022Mar 3, 2024 · In lk, there is a possible escalation of privilege due to a missing bounds check.
    26Monitor
  • ← EarlierCVE-2024-20023Mar 3, 2024 · In flashc, there is a possible out of bounds write due to lack of valudation.
    26Monitor
  • Later →CVE-2024-20049Mar 31, 2024 · In flashc, there is a possible information disclosure due to an uncaught exception.
    17Monitor

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.

No history yet (it accumulates with the daily EPSS job).

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-2024-20148281 days apartIn wlan STA FW, there is a possible out of bounds write due to improper input validation.
    39Monitor
  • CVE-2024-200530 days apartIn flashc, there is a possible out of bounds write due to an uncaught exception.
    33Monitor
  • CVE-2024-20104217 days apartIn da, there is a possible out of bounds write due to a missing bounds check.
    33Monitor
  • CVE-2024-20146281 days apartIn wlan STA driver, there is a possible out of bounds write due to improper input validation.
    32Monitor
  • CVE-2025-20650336 days apartIn da, there is a possible out of bounds write due to a missing bounds check.
    27Monitor
  • CVE-2025-20656372 days apartIn DA, there is a possible out of bounds write due to a missing bounds check.
    27Monitor

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 on the same network segment 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
Adjacent
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:A/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

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

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

All records