How severe is CVE-2021-27656?

CVE-2021-27656 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-27656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27656?

CVE-2021-27656 affects Johnsoncontrols Exacqvision Web Service. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27656 published?

CVE-2021-27656 was published on 2021-03-18 and last updated on 2026-06-17.

CVE-2021-27656

CVE-2021-27656 is a medium-severity vulnerability in Johnsoncontrols Exacqvision Web Service with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Johnsoncontrols Exacqvision Web Service
Published: 2021-03-18
Last modified: 2026-06-17

Description

A vulnerability in exacqVision Web Service 20.12.2.0 and prior could allow an unauthenticated attacker to view system-level information about the exacqVision Web Service and the operating system.

Frequently asked questions

What is CVE-2021-27656?: A vulnerability in exacqVision Web Service 20.12.2.0 and prior could allow an unauthenticated attacker to view system-level information about the exacqVision Web Service and the operating system.
How severe is CVE-2021-27656?: CVE-2021-27656 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-27656 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27656?: CVE-2021-27656 affects Johnsoncontrols Exacqvision Web Service. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27656?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27656 published?: CVE-2021-27656 was published on 2021-03-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:johnsoncontrols:exacqvision_web_service:*:*:*:*:*:*:*:*

More vulnerabilities in Johnsoncontrols Exacqvision Web Service

CVE-2021-27664 — Critical (CVSS 9.8): Under certain configurations an unauthenticated remote user could be given access to credentials stored in the…
CVE-2024-32862 — Medium (CVSS 6.8): Under certain circumstances the ExacqVision Web Services does not provide sufficient protection from untrusted domains.
CVE-2024-32863 — Medium (CVSS 6.8): Under certain circumstances the exacqVision Web Services may be susceptible to Cross-Site Request Forgery (CSRF)
CVE-2020-9047 — Medium (CVSS 6.8): A vulnerability exists that could allow the execution of unauthorized code or operating system commands on systems…
CVE-2024-32864 — Medium (CVSS 6.4): Under certain circumstances exacqVision Web Services will not enforce secure web communications (HTTPS)
CVE-2024-32931 — Medium (CVSS 5.7): Under certain circumstances the exacqVision Web Service can expose authentication token details within communications.

All CVEs affecting Johnsoncontrols Exacqvision Web Service →

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