Cyber Resilience

CVE-2026-45433

HighUpdated

Published: 04 June 2026

Published
04 June 2026
Modified
17 June 2026
KEV Added
—
Patch
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CVSS Score v4 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0034 26.4th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-45433 is a high-severity Use of Hard-coded Cryptographic Key (CWE-321) vulnerability in Org (inferred from references). Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Private Keys (T1552.004); ranked at the 26.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A04:2025 Cryptographic Failures

EU & UK References

Vulnerability details

This vulnerability exists in GX Earth 2022 ONT models due to the presence of hardcoded RSA private key within the device firmware. A remote attacker could exploit this vulnerability by extracting the cryptographic private key from the firmware, which could…

more

lead to decryption of HTTPS traffic and Man-in-the-Middle (MITM) attacks on the targeted device.

CWE(s)
CWE-321

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1552.004 Private Keys Credential Access
Adversaries may search for private key certificate files on compromised systems for insecurely stored credentials.
attack.mitre.org →
T1557 Adversary-in-the-Middle Credential Access
Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support follow-on behaviors such as [Network Sniffing](https://attack.
attack.mitre.org →
Why these techniques?

Hardcoded private key in firmware directly enables credential extraction (T1552.004) and subsequent HTTPS MITM/decryption attacks (T1557).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

Org
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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.

SA-12 Supply Chain Protection
addresses: CWE-321

Supply chain protection includes scrutiny of cryptographic implementations, reducing hard-coded keys planted by untrusted vendors.

SA-4 Acquisition Process
addresses: CWE-321

Functional and assurance requirements specified in acquisition can prohibit hard-coded cryptographic keys in delivered products.

SC-12 Cryptographic Key Establishment and Management
addresses: CWE-321

Proper key establishment and management processes directly preclude embedding static cryptographic keys in source code or binaries.

SC-17 Public Key Infrastructure Certificates
addresses: CWE-321

Approved PKI issuance and trust stores replace ad-hoc or hard-coded keys with properly managed, signed certificates.

SR-6 Supplier Assessments and Reviews
addresses: CWE-321

Assessments can uncover and prevent suppliers from shipping components that contain hard-coded cryptographic keys.

References