CVE-2023-40464Network attack vector

Traffic interception via hard-coded SSL private key

Published Dec 4, 2023 · Updated Feb 25, 2026

Use of a hard-coded cryptographic key in Sierra Wireless ALEOS 4.16 and earlier allows attackers to intercept ACEManager traffic. ALEOS embeds an SSL certificate and its private key in affected firmware, allowing possession of that material to defeat endpoint authentication between the ACEManager client and server. Access to the embedded key material is required; successful interception can expose or modify management traffic but does not interrupt service.

CVSS severity8.1
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of a hard-coded cryptographic key in Sierra Wireless ALEOS 4.16 and earlier allows attackers to intercept ACEManager traffic. ALEOS embeds an SSL certificate and its private key in affected firmware, allowing possession of that material to defeat endpoint authentication between the ACEManager client and server. Access to the embedded key material is required; successful interception can expose or modify management traffic but does not interrupt service.

The record

CVE
CVE-2023-40464
Published
Dec 4, 2023
Updated
Feb 25, 2026
Vendor
Sierra Wireless
Product
ALEOS
Classifications
CWE-321, CWE-798, T1557
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.9.8
  2. Affected versionversion=4.10 <=4.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sierra Wireless · ALEOSversion=0 <=4.9.8; version=4.10 <=4.16

Published CVSS scores

8.1Sierra WirelessCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
6.8NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
CWE-798Use of Hard-coded Credentials
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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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