CVE-2026-71302 PUBLISHED

Toptech TMS7 and TopHAT Session Fixation

Assigner: icscert
Reserved: 10.08.2026 Published: 29.09.2026 Updated: 30.09.2026

The application accepts user-supplied session identifiers and does not regenerate the session ID after authentication. This allows an attacker to predefine a session ID and reuse it after victim authentication, resulting in session takeover.

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
CVSS Score: 7.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	Required	Availability Impact	Low

CVSS 3.1

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
CVSS Score: 7.5

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

CVSS 4.0

Product Status

Vendor	Toptech Systems
Product	TMS7
Versions	Default: unaffected Version 7.6.3 is affected Version 7.8 is unaffected

Vendor	Toptech Systems
Product	TopHAT
Versions	Default: unaffected Version 7.6.3 is affected Version 7.8 is unaffected

Solutions

Toptech Systems sent a security advisory to their customers on July 20, 2026. The issue has been addressed in release 7.8. Users can get the latest release and more information on this issue at the Toptech Systems security blog. https://www.toptech.com/blog/tms7-version-7-8-strengthens-security

Credits

Sachin Shetty and Roy Duisters of Shell CyberDefence reported this vulnerability to Toptech and CISA. finder

References

Problem Types

CWE-384 CWE