FKIE_CVE-2026-40003

Vulnerability from fkie_nvd - Published: 2026-05-07 02:16 - Updated: 2026-05-13 19:19
Severity
5.1 (Medium) - CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
6.8 (Medium) - CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
ZTE ZX297520V3 BootROM contains a vulnerability that allows arbitrary memory writes via USB. Attackers can exploit the lack of target address validation in the USB download mode to write data to any location in BootROM runtime memory, thereby overwriting the stack, hijacking the execution flow, bypassing the Secure Boot signature verification mechanism, and achieving unauthorized code execution.
References
psirt@zte.com.cnhttps://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2144487415169560645Vendor Advisory
Impacted products
Vendor Product Version
zte zx297520v3_firmware -
zte zx297520v3 -
To clipboard 

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    }
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  "id": "CVE-2026-40003",
  "lastModified": "2026-05-13T19:19:26.713",
  "metrics": {
    "cvssMetricV31": [
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          "attackComplexity": "HIGH",
          "attackVector": "PHYSICAL",
          "availabilityImpact": "LOW",
          "baseScore": 5.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.