CVE•Published 2023-10-10•Modified 2026-05-12•1 article on news•6 live references•NVD data
CVE-2023-44487Siemens · Simatic_s7-1500_cpu_1518f-4_pn\/dp_mfp_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2023-10-10
Modified 2026-05-12
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag5,097,398 hosts
vuln:CVE-2023-44487Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Simatic S7-1500 Cpu 1518f-4 Pn\/dp Mfp Firmware"Hosts Shodan identified as running Simatic S7-1500 Cpu 1518f-4 Pn\/dp Mfp Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2023-44487Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2023-44487Censys host search filtered to this CVE id.
grep.app
CVE-2023-44487Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2023-44487GitHub code search for direct mentions.
Google dork
"CVE-2023-44487" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (8)
CVE-2023-444878 repos
sozu-proxy/sozuRust
Sōzu HTTP reverse proxy, configurable at runtime, fast and safe, built in Rust. It is awesome!
0xMarcio/cvePython
Latest CVEs with their Proof of Concept exploits.
mukul975/cve-mcp-serverPython
Production-grade MCP server giving Claude 27 security intelligence tools across 21 APIs — CVE lookup, EPSS scoring, CISA KEV, MITRE ATT&CK, Shodan, VirusTotal, and more.
GhostTroops/TOPShell
TOP All bugbounty pentesting CVE-2023- POC Exp RCE example payload Things
Ostorlab/KEVunknown
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
buybitart/cloudflare-security-artunknown
Cloudflare Free Plan security rules (Zero Trust approach) for small websites
tg12/PoC_CVEsShell
PoC_CVEs
anmolksachan/ThreatTracerPython
ThreatTracer - A tool to identify CVE by name & version and more by @FR13ND0x7F