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CVE-2023-40459

24
FAUCET Score

CVE-2023-40459 describes an input sanitization vulnerability in the ACEManager component of ALEOS 4.16 and earlier, affecting various Sierra Wireless routers. This flaw allows an unauthenticated attacker to trigger a Denial of Service (DoS) condition specifically for ACEManager, which recovers within ten seconds, without impacting other router functions. Rated with a CVSS score of 7.5 (High), the vulnerability is easily exploitable over the network with low attack complexity, leading to high availability impact. There is currently no public exploit code available, it is not listed in CISA's KEV catalog, and community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.16.0CPE matchmatch criteria
cpe:2.3:o:sierrawireless:aleos:*:*:*:*:*:*:*:*
>= 4.10, <= 4.16CPE match
cpe:2.3:o:sierrawireless:aleos:*:*:*:*:*:*:*:*
>= 0, <= 4.9.8CPE match
cpe:2.3:o:sierrawireless:aleos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.30%
Probability of exploitation in next 30 days
EPSS Percentile
81.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0230 is in the 67th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

source.sierrawireless.com / resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006
Vendor Advisory