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  4. CVE 2026 21661 ac2000 uncontrolled search path element
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Back to active CVEs
High · CVSS 8.4CVE-2026-21661

AC2000 Uncontrolled Search Path ElementCVE-2026-21661

Answer in brief

CVE-2026-21661 records a High severity (CVSS 8.4) vulnerability in AC2000 Uncontrolled Search Path Element. The current sources do not mark it as known exploited. The current feed maps Johnson Controls/AC2000 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 6, 2026Updated Aug 24, 2026Source checked Oct 9, 2026First seen by HOL Aug 24, 2026Material review Aug 24, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Johnson Controls/AC2000 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Johnson Controls/AC2000generic>=10.6 <release 10 || >=11.0 <release 9 || >=12 <release 3release 10, release 9, release 3, release

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Johnson Controls/AC2000.
  2. 2Review the reported fix. Update Johnson Controls/AC2000 to release 10 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 24, 2026

Sources and claim methodology

  • Source referencejohnsoncontrols.com
Upstream source description

An Uncontrolled Search Path Element vulnerability in JohnsonControls AC2000 on Windows allows Leveraging/Manipulating Configuration File Search Paths. This issue affects AC2000: from 10.6 before release 10, from 11.0 before release 9, from 12 before release 3.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Unauthenticated JSON API Authorization Bypass Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
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  • Predictable Media Stream Pre-Shared Key Vulnerability in TP-Link Tapo C325WBSame generic ecosystem
  • Eog: eog: arbitrary code execution via heap buffer overflow in png metadata readerSame generic ecosystem
  • fast-jwt treats raw public JWK JSON as an HMAC secret, enabling HS256 token forgerySame generic ecosystem
  • Hazelcast: Authorization bypass in IMap Predicates APISame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-427
Source
CVE List V5
Source checked
Oct 9, 2026
References
1 linked source
Open source record