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VulnerabilityPublished

CVE-2025-66366: Samsung Semiconductor Exynos 1280 · Improper Validation of Array Index

Affects Samsung Semiconductor Exynos 1280Source CVE Database V5

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Not known to be exploited : upgrade to July 2026 soon.

Data as of 5 Nov 2026, 03:12 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in July 2026

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 5 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade Exynos to July 2026.

Affected software

ProductAffectedFixed in
Samsung SemiconductorExynos 1280Affected
  • =0
Fixed in
  • July 2026
Samsung SemiconductorExynos 1330Affected
  • =0
Fixed in
  • July 2026
Samsung SemiconductorExynos 1380Affected
  • =0
Fixed in
  • July 2026
Samsung SemiconductorExynos 1480Affected
  • =0
Fixed in
  • July 2026
Samsung SemiconductorExynos 2400Affected
  • =0
Fixed in
  • July 2026
Samsung SemiconductorExynos 1580Affected
  • =0
Fixed in
  • July 2026

AI-suggested

A fix for this vulnerability was released in July 2026. Users and device manufacturers should apply the official patch to remediate the issue. No additional mitigation steps are indicated.

Description

CVE-2025-66366 is a vulnerability in the Samsung Semiconductor Exynos 1280 chipset where improper validation of array indices in handling unauthenticated downlink RRC Setup messages can cause the baseband to crash. This flaw was fixed in July 2026.

References

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