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CVE-2025-20751· NVD / CVE Program· CNA MediaTek

In Modem, there is a possible system crash due to a missing bounds check.

In Modem, there is a possible system crash due to a missing 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: MOLY01661195; Issue ID: MSV-4297.

MediumCVSS 6.5 · v3.1—No exploit No fix recorded
Published
Dec 1, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 14th percentile
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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

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

VendorProduct
mediateknr15
mediatekmt2735
mediatekmt6833
mediatekmt6833p
mediatekmt6853
mediatekmt6853t
mediatekmt6855
mediatekmt6855t
mediatekmt6873
mediatekmt6875
mediatekmt6875t
mediatekmt6877

and 14 more

Affected versions

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

  • mediatek nr15all versions

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, MT6833, MT6833P, MT6853, MT6853T, MT6855, MT6855T, MT6873, MT6875, MT6875T, MT6877, MT6877T, MT6877TT, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8675, MT8771, MT8791, MT8791T,

    • Modem NR15affected

Same product

mediatek: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-20082In Modem, there is a possible memory corruption due to a missing bounds check.
    39Monitor
  • CVE-2025-20708In Modem, there is a possible out of bounds write due to an incorrect bounds check.
    35Monitor
  • CVE-2026-20401In Modem, there is a possible system crash due to an uncaught exception.
    30Monitor
  • CVE-2025-20666In Modem, there is a possible system crash due to an uncaught exception.
    30Monitor
  • CVE-2024-20094In Modem, there is a possible system crash due to a missing bounds check.
    30Monitor
  • CVE-2024-20004In Modem NL1, there is a possible system crash due to an improper input validation.
    30Monitor

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-2025-2070891 days apartIn Modem, there is a possible out of bounds write due to an incorrect bounds check.
    35Monitor
  • CVE-2026-2040263 days apartIn Modem, there is a possible system crash due to improper input validation.
    26Monitor
  • CVE-2026-2040363 days apartIn Modem, there is a possible system crash due to a missing bounds check.
    26Monitor
  • CVE-2026-2040463 days apartIn Modem, there is a possible system crash due to improper input validation.
    26Monitor

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
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-787 · Out-of-bounds Write

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.

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