Toptech TMS7 and TopHAT Session Fixation
Summary
| CVE | CVE-2026-71302 |
|---|---|
| State | PUBLISHED |
| Assigner | icscert |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-29 22:18:18 UTC |
| Updated | 2026-09-30 16:46:43 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 7.5 HIGH from [email protected]
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-384 | CWE-384 CWE-384
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7.5 | HIGH | 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/E:X/C... |
| 4.0 | CNA | CVSS | 7.5 | HIGH | 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 |
| 3.1 | [email protected] | Secondary | 7.1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L |
| 3.1 | CNA | CVSS | 7.1 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L |
CVSS v4.0 Breakdown
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Toptech Systems | TMS7 | affected 7.6.3 | Not specified |
| CNA | Toptech Systems | TMS7 | unaffected 7.8 | Not specified |
| CNA | Toptech Systems | TopHAT | affected 7.6.3 | Not specified |
| CNA | Toptech Systems | TopHAT | unaffected 7.8 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-27... | [email protected] | github.com | |
| www.cisa.gov/news-events/ics-advisories/icsa-26-272-02 | [email protected] | www.cisa.gov | |
| www.toptech.com/blog/tms7-version-7-8-strengthens-security | [email protected] | www.toptech.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Sachin Shetty and Roy Duisters of Shell CyberDefence reported this vulnerability to Toptech and CISA. (en)
Additional Advisory Data
Solutions
CNA: 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