TI-2026-13110 Aliases CVE-2026-15579 GHSA-hv3x-fr88-gcjp

Out-of-bounds write in Moxa TN-4500B Series

LOW 39CWE-787Published 2026-09-18 · Updated 2026-09-18

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · Low · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

An out-of-bounds write vulnerability exists in some of the Ethernet switches because of improper validation of the username field length during Web login processing. This may allow a remote attacker to submit a specially crafted overly long input, triggering a buffer overflow that can cause the authentication process to crash and result in a Denial of Service (DoS) attack.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00652 51st percentileScored 2026-11-07

Fix Fixed TN-4500B Series (Moxa): 2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Moxa	TN-4500B Series	1.0 – 2.0	2.1	Patch available	CNA

TN-4500B Series VendorMoxa Affected 1.0 – 2.0 Fixed in 2.1 Patch available CNA

Remediation

Fix · CNA TN-4500B Series (Moxa) Fixed in 2.1

Timeline

2026-10-02 Threatist record created from CVE-2026-15579
2026-10-03 Alias added: GHSA-hv3x-fr88-gcjp
2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 1

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-252620-cve-2026-15579-out-of-bounds-write-vulnerability-in-ethernet-switch

TI-2021-17455 Hard-coded credentials in Moxa MXView Series CVSS 3.1CRITICAL 9.8
TI-2010-04465 Stack-based buffer overflow in a certain ActiveX control in MediaDBPlayback.DLL 2.2.0.5… CVSS 2.0HIGH 10.0
TI-2022-19087 A denial of service vulnerability exists in the web server functionality of Moxa SDS-3008… CVSS 3.1HIGH 7.5
TI-2016-07634 Missing brute-force protection in Moxa NPort CVSS 3.1CRITICAL 9.8
TI-2021-17457 Cleartext transmission of sensitive information in Moxa MXView Series CVSS 3.1HIGH 7.5
TI-2022-19326 Information disclosure in Moxa SDS-3008 Series Industrial Ethernet Switch CVSS 3.1MEDIUM 5.3

See all 328 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences