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Vulnerabilities

Vulnerability · CVE-2026-20434

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

Published Mar 2, 2026 · catalog updated Jun 17, 2026 · In Modem, there is

Check if you run it

No confirmed exploitation is on record for CVE-2026-20434. EPSS is 0.23%. Act only if a listed version of In Modem, there is is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (In Modem, there is).
  • 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
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.23%
Remediation
Advisory link
Affected products
cpe mediatek/lr12a · cpe mediatek/lr13 · cpe mediatek/nr15 · cpe mediatek/nr16 · cpe mediatek/nr17

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: MOLY00782946; Issue ID: MSV-4135.

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/lr12aversion unspecified
  • cpe mediatek/lr13version unspecified
  • cpe mediatek/nr15version unspecified
  • cpe mediatek/nr16version unspecified
  • cpe mediatek/nr17version unspecified

How to fix CVE-2026-20434

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-2026-20434. EPSS is 0.23%. Act only if a listed version of In Modem, there is 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 0.23%. 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. Mar 2, 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: MOLY00782946; Issue ID: MSV-4135.

  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: MOLY00782946; Issue ID: MSV-4135.

Sources

  • CVE.orgVulnerability recordCVE-2026-20434

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-20434

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-20434

    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.