CVE-2026-71302

HIGH 7.1

Toptech TMS7 and TopHAT Session Fixation

CVSS Score

7.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-384
Vendor	toptech systems
Product	tms7
Published	Sep 29, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Affected Versions

Toptech Systems / TMS7

7.6.3

Toptech Systems / TopHAT

7.6.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

toptech.com: https://www.toptech.com/blog/tms7-version-7-8-strengthens-security cisa.gov: https://www.cisa.gov/news-events/ics-advisories/icsa-26-272-02 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-272-02.json

Credits

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