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CVE-2021-44040

Status: ModifiedHigh (7.5)—

Improper Input Validation vulnerability in request line parsing of Apache Traffic Server allows an attacker to send invalid requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.3 and 9.0.0 to 9.1.1.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Apache — Traffic ServerDebian — Debian Linux

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2021-44040",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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      "affectedData": [
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          "vendor": "Apache Software Foundation",
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  "published": "2022-03-23T14:15:07.717",
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    },
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      "lang": "es",
      "value": "Una vulnerabilidad de comprobación de entrada inapropiada en el análisis de líneas de petición de Apache Traffic Server permite a un atacante enviar peticiones no válidas. Este problema afecta a Apache Traffic Server versiones 8.0.0 a 8.1.3 y versiones 9.0.0 a 9.1.1"
    }
  ],
  "lastModified": "2026-06-17T04:11:50.160",
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