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Vulnerabilities

Vulnerability · CVE-2026-20433

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

Published Apr 7, 2026 · catalog updated Jun 17, 2026 · mt2735 firmware

Check if you run it

No confirmed exploitation is on record for CVE-2026-20433. EPSS is 0.34%. Act only if a listed version of mt2735 firmware is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.34%
Remediation
Advisory link
Affected products
cpe mediatek/mt2735 firmware · cpe mediatek/mt2737 firmware · cpe mediatek/mt6813 firmware · cpe mediatek/mt6833 firmware · cpe mediatek/mt6833p firmware · cpe mediatek/mt6835 firmware

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY01088681; Issue ID: MSV-4460.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mediatek/mt2735 firmwareversion unspecified
  • cpe mediatek/mt2737 firmwareversion unspecified
  • cpe mediatek/mt6813 firmwareversion unspecified
  • cpe mediatek/mt6833 firmwareversion unspecified
  • cpe mediatek/mt6833p firmwareversion unspecified
  • cpe mediatek/mt6835 firmwareversion unspecified
  • cpe mediatek/mt6835t firmwareversion unspecified
  • cpe mediatek/mt6853 firmwareversion unspecified
  • cpe mediatek/mt6853t firmwareversion unspecified
  • cpe mediatek/mt6855 firmwareversion unspecified
  • cpe mediatek/mt6855t firmwareversion unspecified
  • cpe mediatek/mt6873 firmwareversion unspecified

How to fix CVE-2026-20433

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-20433. EPSS is 0.34%. Act only if a listed version of mt2735 firmware is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-787: Out-of-bounds Write. EPSS 0.34%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 7, 2026 · NIST NVD

    Detected

    In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY01088681; Issue ID: MSV-4460.

  2. Jun 17, 2026 · NIST NVD

    Updated

    In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY01088681; Issue ID: MSV-4460.

Sources

  • CVE.orgVulnerability recordCVE-2026-20433

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-20433

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-20433

    In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.