High severity8.8NVD Advisory· Published Jun 4, 2021· Updated Jun 17, 2026
CVE-2021-27657
CVE-2021-27657
Description
Successful exploitation of this vulnerability could give an authenticated Metasys user an unintended level of access to the server file system, allowing them to access or modify system files by sending specifically crafted web messages to the Metasys system. This issue affects: Johnson Controls Metasys version 11.0 and prior versions.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3<=11.0+ 1 more
- (no CPE)range: <=11.0
- (no CPE)range: 11.0
Patches
Vulnerability mechanics
References
3- us-cert.cisa.gov/ics/advisories/icsa-21-159-01nvdThird Party AdvisoryUS Government Resource
- us-cert.gov/ics/advisoriesnvdThird Party AdvisoryUS Government Resource
- www.johnsoncontrols.com/cyber-solutions/security-advisoriesnvdVendor Advisory
News mentions
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