Improper input leads to DoS

published 2023-12-04 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-45036

cvss: 8.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits: 0; none known

Several versions of ALEOS, including ALEOS 4.16.0, include an opensource

third-party component which can be exploited from the local

area network, resulting in a Denial of Service condition for the captive portal.

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.3	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA	3.1	4.3	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

SierraWireless ALEOS

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
CWE-122 Heap-based Buffer Overflow
CWE-787 Out-of-bounds Write

References

source.sierrawireless.com /resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006/#sthash.6KUVtE6w.dpbs
vendor-advisory

Sources

CVE List CVE-2023-40465
NVD CVE-2023-40465

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary