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NVD / CVE Program· CNA MediaTek

CVE-2025-20659: In Modem, there is a possible system crash due to improper input validation.

MediumCVSS 6.5 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 26/100)

  • 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: 0.35% (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 Modem, there is a possible system crash due to improper input validation. 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: MOLY01519028; Issue ID: MSV-2768.

Published
Apr 7, 2025
Updated
Jun 17, 2026
EPSS
0.3% · 29th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

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-2025-20659

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
mediatekmt2735 firmware
mediatekmt2735
mediatekmt2737 firmware
mediatekmt2737
mediatekmt6739 firmware
mediatekmt6739
mediatekmt6761 firmware
mediatekmt6761
mediatekmt6762 firmware
mediatekmt6762
mediatekmt6762d firmware
mediatekmt6762d

and 158 more

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. MT2735, MT2737, MT6739, MT6761, MT6762, MT6762D, MT6762M, MT6763, MT6765, MT6765T, MT6767, MT6768, MT6769, MT6769K, MT6769S, MT6769T, MT6769Z, MT6771, MT6779, MT6781, MT6783, MT6785, MT6785T, MT6785U,

    • Modem LR12A, LR13, NR15, NR16, NR17, NR17Raffected
Affected versions · NVD (20)

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

  • mediatek mt2735 firmwareall versions
  • mediatek mt2737 firmwareall versions
  • mediatek mt6739 firmwareall versions
  • mediatek mt6761 firmwareall versions
  • mediatek mt6762 firmwareall versions
  • mediatek mt6762d firmwareall versions
  • mediatek mt6762m firmwareall versions
  • mediatek mt6763 firmwareall versions
  • mediatek mt6765 firmwareall versions
  • mediatek mt6765t firmwareall versions
  • mediatek mt6767 firmwareall versions
  • mediatek mt6768 firmwareall versions
  • mediatek mt6769 firmwareall versions
  • mediatek mt6769k firmwareall versions
  • mediatek mt6769s firmwareall versions
  • mediatek mt6769t firmwareall versions
  • mediatek mt6769z firmwareall versions
  • mediatek mt6771 firmwareall versions
  • mediatek mt6779 firmwareall versions
  • mediatek mt6781 firmwareall versions

Same product

mediatek: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-20433In Modem, there is a possible out of bounds write due to a missing bounds check.
    35Monitor
  • CVE-2026-20432In Modem, there is a possible out of bounds write due to a missing bounds check.
    32Monitor
  • CVE-2026-20479In Modem, there is a possible out of bounds read due to a missing bounds check.
    30Monitor

Published before and after this one in the same product

  • Later →CVE-2026-20450May 4, 2026 · In Modem, there is a possible system crash due to incorrect error handling.
    26Monitor
  • Later →CVE-2026-20478Aug 3, 2026 · In Audio HAL, there is a possible out of bounds write due to a heap buffer overflow.
    22Monitor
  • Later →CVE-2026-20491Aug 3, 2026 · In med, there is a possible out of bounds write due to an incorrect bounds check.
    22Monitor

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.

Variant candidates

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

  • CVE-2026-20479483 days apartIn Modem, there is a possible out of bounds read due to a missing bounds check.
    30Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

ATT&CK techniques

—

References

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

All records