CVE-2023-44487

CVE-2023-44487 is a high-severity vulnerability in Siemens Sinec Ins with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-10-10). The underlying weakness is classified as CWE-400.

Key facts

Description

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

Frequently asked questions

What is CVE-2023-44487?
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.
How severe is CVE-2023-44487?
CVE-2023-44487 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 none, integrity none, and availability high.
Is CVE-2023-44487 being actively exploited?
Yes. CVE-2023-44487 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-10-10, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-44487?
CVE-2023-44487 primarily affects Siemens Sinec Ins. In total, 227 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-44487?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-44487 have an EU (EUVD) identifier?
Yes. CVE-2023-44487 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-2795. It is also flagged as exploited in the EUVD (since 2023-10-10).
When was CVE-2023-44487 published?
CVE-2023-44487 was published on 2023-10-10 and last updated on 2026-06-17.

References

Affected products (227)

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Threat intelligence

Threat-intel indicators referencing this CVE: