No exploitation reportedFix available

CVE-2021-44523

Q: Is CVE-2021-44523 actively exploited?

Active exploitation of CVE-2021-44523 has not been confirmed. Its EPSS score was 1.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-44523?

CVE-2021-44523 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

No exploitation reported by the sources we read.

Published2021-12-14
WeaknessCWE-668

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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 activity feed database. This could allow an unauthenticated remote attacker to read, modify or delete activity feed entries.

Timeline

dates in UTC

2021-12-1412:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-44523?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-44523?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens sipass integrated

Branch	Affected	Fixed in	Source
2.76	= 2.76	no fix published	NVD
2.80	= 2.80	no fix published	NVD
2.85	= 2.85	no fix published	NVD

Siemens siveillance identity

Branch	Affected	Fixed in	Source
1.6	≥ 1.6, ≤ 1.6.280.0	no fix published	NVD
1.5	= 1.5	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-350-14 CISA2 known affected
Siemens Siveillance Identity
Siveillance Identity V1.5 · Siveillance Identity V1.6
ICSA-21-350-19 CISA3 known affected
Siemens SiPass Integrated
SiPass integrated V2.76 · SiPass integrated V2.80 · SiPass integrated V2.85

Full record on NVD

Fix

Vendor fix CISA ICSA-21-350-14 · 1 productUpdate to V1.6.284.0 or later version
Vendor fix CISA ICSA-21-350-14 · 1 productUpdate to V1.5 SP4 and apply the Credential Patch Tool: https://support.industry.siemens.com/cs/ww/en/view/109801824/
Vendor fix CISA ICSA-21-350-19 · 1 productUpdate to V2.76 SP2 and then download and execute the SiPass integrated Component Manager: https://support.industry.siemens.com/cs/ww/en/view/109802587/
Vendor fix CISA ICSA-21-350-19 · 2 productsDownload and execute the SiPass integrated Component Manager: https://support.industry.siemens.com/cs/ww/en/view/109802587/

Advisories and patches

cert-portal.siemens.comVendor Advisory
cert-portal.siemens.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.1read 2026-10-23
NVDCVSS 2.06.4read 2026-10-23
CNAweakness (CWE)CWE-668read 2026-10-23
FIRST EPSSEPSS score1.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2021-12-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-44523?

Is CVE-2021-44523 actively exploited?

Active exploitation of CVE-2021-44523 has not been confirmed. Its EPSS score was 1.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-44523?

CVE-2021-44523 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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