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FORENSIA

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Verdict

ACTIVELY EXPLOITED (CISA KEV)

What is this: A software vulnerability. (CWE-400: Uncontrolled Resource Consumption) Affects Siemens Simatic S7-1500 Cpu 1518F-4 Pn/Dp Mfp Firmware.
Should you care: Yes — confirmed exploited in the wild (CISA Known Exploited Vulnerabilities). CVSS 7.5 (high).
What to do: Patch now.

INVESTIGATEHIGH EVIDENCE COVERAGEDeterministic · stored evidence only

Vulnerability investigation

Known exploitation makes this a patch priority

CISA confirms this vulnerability has been exploited in the wild. NVD rates the technical severity high at CVSS 7.5. These are public vulnerability signals, not proof that a specific environment runs an affected version.

Exploitation status

CISA KEV · exploited in the wild

Added 2023-10-10.

30-day exploitation likelihood

Unavailable

FIRST EPSS did not return a score.

Technical severity

7.5 · high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected surface

52 parsed products

HTTP/2, Siemens Simatic S7-1500 Cpu 1518F-4 Pn/Dp Mfp Firmware, Siemens Simatic S7-1500 Cpu 1518F-4 Pn/Dp Mfp

Weakness class

CWE-400: Uncontrolled Resource Consumption

CWE describes the weakness category, not whether a deployed product is reachable or exploitable.

Corpus evidence

2 connectors · 1348 citations

No related report text is available in the local corpus.

What the evidence supports

Findings stay bounded to named sources and observable infrastructure.

3 findings

Confirmed exploitation in the wild

HIGH

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA KEV · added 2023-10-10 · action due 2023-10-31

The CISA due date applies to U.S. federal civilian agencies; other organizations should use the action as authoritative remediation guidance, not a universal legal deadline.

CVSS 7.5 high technical impact

HIGH

Network · Low · None

NIST NVD CVSS

CVSS measures technical severity and prerequisites; it does not measure observed exploitation likelihood.

52 affected product mappings

MODERATE

What remains unknown

Whether your environment runs an affected product and version is not established by this public lookup.
Reachability, compensating controls, and successful exploitation in a specific environment are not checked.
No locally ingested public report supplies exploit, actor, or campaign context for this CVE.

What this is

CVE-2023-44487 · CWE context (CWE-400)

Evidence readiness

The base CVE appears first. Independent evidence is added without blocking the page.

Investigation status

Checking for newly completed evidence

Refreshing

NIST NVD

NVD evidence is available in this response

Ready

CISA KEV

Listed in the local CISA KEV catalog

Ready

FIRST EPSS

Forensia does not request or publish EPSS while source rights are under review

Rights pending

Reports

Report links are still being resolved

Pending

Relationships

Product and vulnerability relationships are still being prepared

Pending

Vulnerability intel

Local EPSS row, KEV flag, and catalog notes from stored metadata only.

CISA KEV2023-10-10

CVE: CVE-2023-44487
EPSS probability: not fetched / unavailable
EPSS fetched_at: 2026-08-11T10:44:17.711697Z

Added 2023-10-10Federal due date 2023-10-31

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The catalog due date governs U.S. federal civilian agencies; use the action as authoritative remediation guidance, not a universal legal deadline.

related indicators · 14

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