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Vulnerabilities

Vulnerability · CVE-2026-66086

In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages.

Published Oct 12, 2026 · catalog updated Oct 15, 2026 · In the modem OTA

Check if you run it

No confirmed exploitation is on record for CVE-2026-66086. EPSS is 0.46%. Act only if a listed version of In the modem OTA 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 the modem OTA).
  • 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
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.46%
Remediation
Advisory link
Affected products
See sources for product scope

In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges needed.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-66086

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-2026-66086. EPSS is 0.46%. Act only if a listed version of In the modem OTA 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-121: Stack-based Buffer Overflow. EPSS 0.46%. 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. Oct 12, 2026 · NIST NVD

    Detected

    In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges needed.

  2. Oct 15, 2026 · NIST NVD

    Updated

    In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges needed.

Sources

  • CVE.orgVulnerability recordCVE-2026-66086

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-66086

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-66086

    In the modem OTA stack, there is a possible stack-based buffer overflow due to improper validation of scheduling information in SIB1 messages. This could lead to remote code execution or denial of service with no additional execution privileges 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.