How severe is CVE-2021-22806?

CVE-2021-22806 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-22806 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22806?

CVE-2021-22806 primarily affects Schneider-electric Spacelynk Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22806?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22806 published?

CVE-2021-22806 was published on 2022-02-11 and last updated on 2026-06-17.

CVE-2021-22806

CVE-2021-22806 is a high-severity vulnerability in Schneider-electric Spacelynk Firmware with a CVSS 3.x base score of 7.5. 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-669.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-669
Affected product: Schneider-electric Spacelynk Firmware
Published: 2022-02-11
Last modified: 2026-06-17

Description

A CWE-669: Incorrect Resource Transfer Between Spheres vulnerability exists that could cause data exfiltration and unauthorized access when accessing a malicious website. Affected Product: spaceLYnk (V2.6.1 and prior), Wiser for KNX (V2.6.1 and prior), fellerLYnk (V2.6.1 and prior)

Frequently asked questions

What is CVE-2021-22806?: A CWE-669: Incorrect Resource Transfer Between Spheres vulnerability exists that could cause data exfiltration and unauthorized access when accessing a malicious website. Affected Product: spaceLYnk (V2.6.1 and prior), Wiser for KNX (V2.6.1 and prior), fellerLYnk (V2.6.1 and prior)
How severe is CVE-2021-22806?: CVE-2021-22806 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-22806 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22806?: CVE-2021-22806 primarily affects Schneider-electric Spacelynk Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22806?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22806 published?: CVE-2021-22806 was published on 2022-02-11 and last updated on 2026-06-17.

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-285-01

Affected products (3)

cpe:2.3:o:schneider-electric:spacelynk_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:wiser_for_knx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:fellerlynk_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Schneider-electric Spacelynk Firmware

CVE-2022-22810 — Critical (CVSS 9.8): A CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists that could allow an attacker…
CVE-2021-22738 — Critical (CVSS 9.8): Use of a Broken or Risky Cryptographic Algorithm vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60…
CVE-2021-22737 — Critical (CVSS 9.8): Insufficiently Protected Credentials vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior…
CVE-2019-6832 — High (CVSS 8.3): A CWE-287: Authentication vulnerability exists in spaceLYnk (all versions before 2.4.0) and Wiser for KNX (all versions…
CVE-2022-22811 — High (CVSS 8.1): A CWE-352: Cross-Site Request Forgery (CSRF) vulnerability exists that could induce users to perform unintended…
CVE-2021-22733 — High (CVSS 7.8): Improper Privilege Management vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior which…

All CVEs affecting Schneider-electric Spacelynk Firmware →

Other CWE-669 vulnerabilities

CVE-2021-30120 — Critical (CVSS 9.9): Kaseya VSA before 9.5.7 allows attackers to bypass the 2FA requirement. The need to use 2FA for authentication in…
CVE-2025-67895 — Critical (CVSS 9.8): Edge3 Worker RPC RCE on Airflow 2. This issue affects Apache Airflow Providers Edge3: before 2.0.0 - and only if you…
CVE-2022-4446 — Critical (CVSS 9.8): PHP Remote File Inclusion in GitHub repository tsolucio/corebos prior to 8.0.
CVE-2020-24683 — Critical (CVSS 9.8): The affected versions of S+ Operations (version 2.1 SP1 and earlier) used an approach for user authentication which…
CVE-2020-5800 — Critical (CVSS 9.8): The Eat Spray Love mobile app for both iOS and Android contains logic that allows users to bypass authentication and…
CVE-2020-15892 — Critical (CVSS 9.8): An issue was discovered in apply.cgi on D-Link DAP-1520 devices before 1.10b04Beta02. Whenever a user performs a login…

Browse all CWE-669 vulnerabilities →