CVE-2021-36205

CRITICAL

Under certain circumstances the session token is not cleared on logout.

Affects 3 products across 2 vendors.

BCS6.9
CVSS 3.19.8
EPSS1.0%
Percentile63th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-459: CWE-459
◆ AI Analysis — automated analysis, not human-reviewed

A critical vulnerability exists in the session management mechanism where the session token is not cleared upon user logout, potentially allowing unauthorized access.

BSID: BS-2022-GLOBAL-297272-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2021-36205?
A critical vulnerability exists in the session management mechanism where the session token is not cleared upon user logout, potentially allowing unauthorized access.
What is the CVSS score for CVE-2021-36205?
CVE-2021-36205 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 1.0%.
Is CVE-2021-36205 actively exploited?
No confirmed active exploitation of CVE-2021-36205 as of 2026-09-25.
How do I remediate CVE-2021-36205?
Priority: IMMEDIATE. Advisory: https://www.johnsoncontrols.com/cyber-solutions/security-advisories PSIRT: [email protected]
What systems are affected by CVE-2021-36205?
CVE-2021-36205 affects: Johnsoncontrols, Johnsoncontrols, Johnsoncontrols, Michael K. Johnson.
Vulnerability Details
CVE IDCVE-2021-36205
BSIDBS-2022-GLOBAL-297272-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2022-04-15
Last Modified2026-06-17
ICS Relevance55%
Weakness (CWE)
CWE-459
SourceNVD
Official Description

Under certain circumstances the session token is not cleared on logout.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

An attacker could exploit this vulnerability by intercepting or guessing the session token of a logged-out user, thereby gaining unauthorized access to the user's account.

Exploitation Likelihood: CRITICAL

Affected Products
VendorProductAffected Versions
Johnsoncontrols Metasys Application And Data Server ≥ 10.0, < 10.1.5 ≥ 11.0, < 11.0.2
Johnsoncontrols Metasys Extended Application And Data Server ≥ 10.0, < 10.1.5 ≥ 11.0, < 11.0.2
Johnsoncontrols Metasys Open Application Server ≥ 10.0, < 10.1.5 ≥ 11.0, < 11.0.2
Michael K. Johnson &mdash; —
Remediation
View Vendor Advisory →

Remediation Priority: IMMEDIATE

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 1629 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hash126cb2942e494a7803c1512dce3fc5d2c554ca65141a4a29bd08760e168b82629bd38c928bd077a8c28e816c99eb9a0ef5827c3cbef0e654b745c74c8c4fbfdd
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