CVE-2026-93475

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Source
https://cve.org/CVERecord?id=CVE-2026-93475
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93475.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-93475
Aliases
  • GHSA-rcv5-vfff-25gh
Published
2026-10-20T15:04:30Z
Modified
2026-10-21T03:00:16Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Out-of-bounds Write via an Unbounded RSA Modulus in NetX Secure X.509
Details

The X.509 parser in NetX Secure accepts an RSA public key of any size, but every signature-verification path decrypts into fixed-size buffers dimensioned for the NX_CRYPTO_MAX_RSA_MODULUS_SIZE default of 4096 bits. A certificate carrying a larger modulus drives an out-of-bounds write past a file-scope static during ordinary certificate-chain verification.

It is reachable pre-authentication. The issuer used for the crypto operation is looked up in the remote, peer-supplied store before the trusted store, so the attacker supplies the oversized key themselves as an intermediate in the chain they present. It triggers on a TLS or DTLS client verifying a malicious server's chain, and on a server performing client-certificate authentication.

Database specific 
{
    "cna_assigner":  "eclipse",
    "cwe_ids":  [
        "CWE-1284",
        "CWE-787"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93475.json"
}
References

Affected packages

Git / github.com/eclipse-threadx/netxduo

Affected ranges

Type
GIT
Repo
https://github.com/eclipse-threadx/netxduo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
1a0e9e43a03e37ddecfb6b49e9b078d6e1803d05
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "6.5.1.202602"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        }
    ]
}

Affected versions

v.*
v.6.4.4.202503_rel
v6.*
v6.0.1_rel
v6.0.2_rel
v6.0_rel
v6.1.10_rel
v6.1.11_rel
v6.1.12_rel
v6.1.2_rel
v6.1.3_rel
v6.1.4_rel
v6.1.5_rel
v6.1.6_rel
v6.1.7_rel
v6.1.8_rel
v6.1.9_rel
v6.1_rel
v6.2.0_rel
v6.2.1_rel
v6.3.0_rel
v6.4.0_rel
v6.4.1_rel
v6.4.2_rel
v6.4.3_rel
v6.4.4.202503a
v6.4.5.202504_rel
v6.5.0.202601_rel
v6.5.1.202602_rel

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93475.json"