CVE-2026-55730 PUBLISHED

Loytec LWEB802: Reflected Cross-Site Scripting in LWEB802

Assigner: NCSC.ch
Reserved: 17.06.2026 Published: 24.07.2026 Updated: 24.07.2026

Reflected Cross-Site Scripting (CWE-79) in LWEB802 in Loytec LWEB-802 before 5.0.8 on all platforms allows an unauthenticated remote attacker to execute arbitrary JavaScript in a victim's browser and perform actions with the victim's privileges via a crafted link containing a malicious project or mspParams parameter.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	Loytec
Product	LWEB-802
Versions	Default: unaffected affected from 0 to 5.0.8 (excl.)

Solutions

Update to LWEB-802 version 5.0.8.

Credits

Daniel Hulliger, armasuisse CYD Campus finder
Damian Pfammatter, armasuisse CYD Campus finder

References

https://www.loytec.com/support/product-security/advisories/8527-dibt-cve-20260601-0002-reflected-cross-site-scripting-xss-high

Problem Types

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') CWE
CWE-116 Improper encoding or escaping of output CWE

Impacts

CAPEC-63 Cross-Site Scripting (XSS)