Cyber Resilience

CVE-2025-55050

Critical

Published: 09 September 2025

Published
09 September 2025
Modified
15 April 2026
KEV Added
Patch
CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0009 25.2th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-55050 is a critical-severity Inclusion of Undocumented Features or Chicken Bits (CWE-1242) vulnerability in Gov (inferred from references). Its CVSS base score is 9.8 (Critical).

Operationally, ranked at the 25.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

CWE-1242: Inclusion of Undocumented Features

CWE(s)

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

Gov
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-1242

Requiring an inventory that accurately reflects the system forces documentation of all components, making inclusion of undocumented features or chicken bits harder to achieve without detection.

addresses: CWE-1242

Review and update processes include scrutiny of undocumented features or debug mechanisms provided by component manufacturers.

addresses: CWE-1242

Requires transparency and verification of delivered components, limiting undocumented features or debug hooks introduced upstream.

addresses: CWE-1242

Discourages undocumented features or chicken bits by demanding transparency and verification that only intended, documented behavior is present.

addresses: CWE-1242

Developing critical components internally avoids undocumented features and chicken bits present in vendor hardware or software.

addresses: CWE-1242

Requiring screened developers with proper access limits the introduction of undocumented features or debug 'chicken bits' that could be exploited later.

addresses: CWE-1242

Inspection can uncover undocumented features or chicken bits that result from tampering or malicious insertion.

References