CVE-2021-34125Public exploit

Firmware disclosure via unrestricted NSH memory reads

Published Mar 9, 2023 · Updated Feb 28, 2025

Information disclosure in Yuneec Mantis Q and PX4-Autopilot 1.11.3 and earlier allows attackers to read firmware through NuttX NSH. The mb, mh, and mw commands accept attacker-chosen addresses and print memory contents, allowing flash firmware to be extracted despite hardware read protection. Access to an exposed NSH console over a serial or MAVLink transport is required; successful use discloses firmware contents but does not modify them.

CVSS severityUnavailable
Unscored
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Yuneec Mantis Q and PX4-Autopilot 1.11.3 and earlier allows attackers to read firmware through NuttX NSH. The mb, mh, and mw commands accept attacker-chosen addresses and print memory contents, allowing flash firmware to be extracted despite hardware read protection. Access to an exposed NSH console over a serial or MAVLink transport is required; successful use discloses firmware contents but does not modify them.

The record

CVE
CVE-2021-34125
Published
Mar 9, 2023
Updated
Feb 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1005
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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