CVE-2021-44693

MEDIUMNVD 4.97.5▲

4.9

Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.

CVSS v3: 4.9
EG Score: 7.5(medium)
EPSS: 40.8%
KEV: Not listed

Published

December 13, 2022

Last Modified

November 21, 2024

References (2)

productcert@siemenshttps://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-382653.pdf

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-1284Improper Validation of Specified Quantity in Input

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 10:47 UTCEG score recompute
2026-05-25 10:47 UTCGHSA enrichment
2026-05-25 07:46 UTCOSV refresh

Frequently asked(5)

What is CVE-2021-44693?

CVE-2021-44693 is a medium vulnerability published on December 13, 2022. Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.

When was CVE-2021-44693 disclosed?

CVE-2021-44693 was first published in the National Vulnerability Database on December 13, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-44693 actively exploited?

CVE-2021-44693 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-44693?

CVE-2021-44693 has a CVSS v3 base score of 4.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5.

How do I remediate CVE-2021-44693?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-44693, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-44693

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CVE-2021-44693

📅 Published

🔄 Last Modified

🔗 References (2)