How severe is CVE-2021-27659?

CVE-2021-27659 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 low, and availability none.

Is CVE-2021-27659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27659?

CVE-2021-27659 affects Johnsoncontrols Exacqvision Web Service. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27659?

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

When was CVE-2021-27659 published?

CVE-2021-27659 was published on 2021-06-24 and last updated on 2026-06-17.

CVE-2021-27659

CVE-2021-27659 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Johnsoncontrols Exacqvision Web Service
Published: 2021-06-24
Last modified: 2026-06-17

Description

exacqVision Web Service 21.03 does not sufficiently validate, filter, escape, and/or encode user-controllable input before it is placed in output that is used as a web page that is served to other users.

Frequently asked questions

What is CVE-2021-27659?: exacqVision Web Service 21.03 does not sufficiently validate, filter, escape, and/or encode user-controllable input before it is placed in output that is used as a web page that is served to other users.
How severe is CVE-2021-27659?: CVE-2021-27659 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 low, and availability none.
Is CVE-2021-27659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27659?: CVE-2021-27659 affects Johnsoncontrols Exacqvision Web Service. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27659?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27659 published?: CVE-2021-27659 was published on 2021-06-24 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.

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