How severe is CVE-2021-44522?

CVE-2021-44522 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-2021-44522 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44522?

CVE-2021-44522 primarily affects Siemens Sipass Integrated. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-44522?

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-2021-44522 published?

CVE-2021-44522 was published on 2021-12-14 and last updated on 2026-06-17.

CVE-2021-44522

CVE-2021-44522 is a high-severity vulnerability in Siemens Sipass Integrated 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-668.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-668
Affected product: Siemens Sipass Integrated
Published: 2021-12-14
Last modified: 2026-06-17

Description

A vulnerability has been identified in SiPass integrated V2.76 (All versions), SiPass integrated V2.80 (All versions), SiPass integrated V2.85 (All versions), Siveillance Identity V1.5 (All versions), Siveillance Identity V1.6 (All versions < V1.6.284.0). Affected applications insufficiently limit the access to the internal message broker system. This could allow an unauthenticated remote attacker to subscribe to arbitrary message queues.

Frequently asked questions

What is CVE-2021-44522?: A vulnerability has been identified in SiPass integrated V2.76 (All versions), SiPass integrated V2.80 (All versions), SiPass integrated V2.85 (All versions), Siveillance Identity V1.5 (All versions), Siveillance Identity V1.6 (All versions < V1.6.284.0). Affected applications insufficiently limit the access to the internal message broker system. This could allow an unauthenticated remote attacker to subscribe to arbitrary message queues.
How severe is CVE-2021-44522?: CVE-2021-44522 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-2021-44522 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44522?: CVE-2021-44522 primarily affects Siemens Sipass Integrated. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-44522?: 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-2021-44522 published?: CVE-2021-44522 was published on 2021-12-14 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:siemens:sipass_integrated:2.76:-:*:*:*:*:*:*
cpe:2.3:a:siemens:sipass_integrated:2.76:sp1:*:*:*:*:*:*
cpe:2.3:a:siemens:sipass_integrated:2.80:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sipass_integrated:2.85:*:*:*:*:*:*:*
cpe:2.3:a:siemens:siveillance_identity:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:siveillance_identity:1.5:*:*:*:*:*:*:*

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