{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-1379",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-1379",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-11-18T15:42:00.388Z",
    "updatedAt": "2024-11-18T16:23:13.534Z",
    "importedAt": "2026-10-24T01:56:21.187Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Cisco IP Phones Cisco Discovery Protocol and Link Layer Discovery Protocol Remote Code Execution and Denial of Service Vulnerabilities",
      "summary": "Multiple vulnerabilities in the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP) implementations for Cisco IP Phone Series 68xx/78xx/88xx could allow an unauthenticated, adjacent attacker to execute code remotely or cause a reload of an affected IP phone.\r\nThese vulnerabilities are due to missing checks when the IP phone processes a Cisco Discovery Protocol or LLDP packet. An attacker could exploit these vulnerabilities by sending a malicious Cisco Discovery Protocol or LLDP packet to the targeted IP phone. A successful exploit could allow the attacker to execute code on the affected IP phone or cause it to reload unexpectedly, resulting in a denial of service (DoS) condition.Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.",
      "affected": [
        {
          "vendor": "Cisco",
          "product": "Cisco IP Phones with Multiplatform Firmware",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "11.1.2",
              "status": "affected"
            },
            {
              "version": "11.2.1",
              "status": "affected"
            },
            {
              "version": "11.2.3",
              "status": "affected"
            },
            {
              "version": "11.2.2",
              "status": "affected"
            },
            {
              "version": "11.2.3 MSR1-1",
              "status": "affected"
            },
            {
              "version": "11.1.2 MSR1-1",
              "status": "affected"
            },
            {
              "version": "11.1.1",
              "status": "affected"
            },
            {
              "version": "11.1.2 MSR3-1",
              "status": "affected"
            },
            {
              "version": "11.0.0",
              "status": "affected"
            },
            {
              "version": "11.1.1 MSR1-1",
              "status": "affected"
            },
            {
              "version": "11.0.1",
              "status": "affected"
            },
            {
              "version": "11.1.1 MSR2-1",
              "status": "affected"
            },
            {
              "version": "11.2.4",
              "status": "affected"
            },
            {
              "version": "11.0.1 MSR1-1",
              "status": "affected"
            },
            {
              "version": "11.0.2",
              "status": "affected"
            },
            {
              "version": "11.3.1",
              "status": "affected"
            },
            {
              "version": "11.3.1 MSR1-3",
              "status": "affected"
            },
            {
              "version": "11.3.2",
              "status": "affected"
            },
            {
              "version": "11.3.1 MSR2-6",
              "status": "affected"
            },
            {
              "version": "11.3.1 MSR3-3",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Cisco",
          "product": "Cisco Session Initiation Protocol (SIP) Software",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "9.0(3)",
              "status": "affected"
            },
            {
              "version": "9.0(2)SR2",
              "status": "affected"
            },
            {
              "version": "9.0(2)SR1",
              "status": "affected"
            },
            {
              "version": "9.2(1)",
              "status": "affected"
            },
            {
              "version": "9.4(2)SR1",
              "status": "affected"
            },
            {
              "version": "9.4(2)",
              "status": "affected"
            },
            {
              "version": "9.4(2)SR2",
              "status": "affected"
            },
            {
              "version": "9.4(2)SR3",
              "status": "affected"
            },
            {
              "version": "9.3(1)SR2",
              "status": "affected"
            },
            {
              "version": "9.3(1)SR3",
              "status": "affected"
            },
            {
              "version": "9.3(1)SR1",
              "status": "affected"
            },
            {
              "version": "9.1(1)SR1",
              "status": "affected"
            },
            {
              "version": "9.3(1)SR4",
              "status": "affected"
            },
            {
              "version": "9.2(3)",
              "status": "affected"
            },
            {
              "version": "9.2(1)SR2",
              "status": "affected"
            },
            {
              "version": "9.3(1)",
              "status": "affected"
            },
            {
              "version": "9.4(2)SR4",
              "status": "affected"
            },
            {
              "version": "12.1(1)SR1",
              "status": "affected"
            },
            {
              "version": "11.5(1)",
              "status": "affected"
            },
            {
              "version": "10.3(2)",
              "status": "affected"
            },
            {
              "version": "10.2(2)",
              "status": "affected"
            },
            {
              "version": "10.3(1)",
              "status": "affected"
            },
            {
              "version": "10.3(1)SR4",
              "status": "affected"
            },
            {
              "version": "11.0(1)",
              "status": "affected"
            },
            {
              "version": "10.4(1)SR2 3rd Party",
              "status": "affected"
            },
            {
              "version": "11.7(1)",
              "status": "affected"
            },
            {
              "version": "12.1(1)",
              "status": "affected"
            },
            {
              "version": "11.0(0.7) MPP",
              "status": "affected"
            },
            {
              "version": "9.3(4) 3rd Party",
              "status": "affected"
            },
            {
              "version": "12.5(1)SR2",
              "status": "affected"
            },
            {
              "version": "10.2(1)SR1",
              "status": "affected"
            },
            {
              "version": "9.3(4)SR3 3rd Party",
              "status": "affected"
            },
            {
              "version": "10.2(1)",
              "status": "affected"
            },
            {
              "version": "12.5(1)",
              "status": "affected"
            },
            {
              "version": "10.3(1)SR2",
              "status": "affected"
            },
            {
              "version": "11-0-1MSR1-1",
              "status": "affected"
            },
            {
              "version": "10.4(1) 3rd Party",
              "status": "affected"
            },
            {
              "version": "12.5(1)SR1",
              "status": "affected"
            },
            {
              "version": "11.5(1)SR1",
              "status": "affected"
            },
            {
              "version": "10.1(1)SR2",
              "status": "affected"
            },
            {
              "version": "12.0(1)SR2",
              "status": "affected"
            },
            {
              "version": "12.6(1)",
              "status": "affected"
            },
            {
              "version": "10.3(1.11) 3rd Party",
              "status": "affected"
            },
            {
              "version": "12.0(1)",
              "status": "affected"
            },
            {
              "version": "12.0(1)SR1",
              "status": "affected"
            },
            {
              "version": "9.3(3)",
              "status": "affected"
            },
            {
              "version": "12.5(1)SR3",
              "status": "affected"
            },
            {
              "version": "10.3(1)SR4b",
              "status": "affected"
            },
            {
              "version": "9.3(4)SR1 3rd Party",
              "status": "affected"
            },
            {
              "version": "10.3(1)SR5",
              "status": "affected"
            },
            {
              "version": "10.1(1.9)",
              "status": "affected"
            },
            {
              "version": "10.3(1.9) 3rd Party",
              "status": "affected"
            },
            {
              "version": "9.3(4)SR2 3rd Party",
              "status": "affected"
            },
            {
              "version": "10.3(1)SR1",
              "status": "affected"
            },
            {
              "version": "10.3(1)SR3",
              "status": "affected"
            },
            {
              "version": "10.1(1)SR1",
              "status": "affected"
            },
            {
              "version": "12.0(1)SR3",
              "status": "affected"
            },
            {
              "version": "12.6(1)SR1",
              "status": "affected"
            },
            {
              "version": "12.7(1)",
              "status": "affected"
            },
            {
              "version": "10.3(1)SR6",
              "status": "affected"
            },
            {
              "version": "12.8(1)",
              "status": "affected"
            },
            {
              "version": "12.7(1)SR1",
              "status": "affected"
            },
            {
              "version": "11.0(2)SR1",
              "status": "affected"
            },
            {
              "version": "11.0(4)",
              "status": "affected"
            },
            {
              "version": "11.0(2)",
              "status": "affected"
            },
            {
              "version": "11.0(4)SR3",
              "status": "affected"
            },
            {
              "version": "11.0(5)",
              "status": "affected"
            },
            {
              "version": "11.0(3)SR2",
              "status": "affected"
            },
            {
              "version": "11.0(3)SR4",
              "status": "affected"
            },
            {
              "version": "11.0(3)SR3",
              "status": "affected"
            },
            {
              "version": "11.0(2)SR2",
              "status": "affected"
            },
            {
              "version": "11.0(4)SR1",
              "status": "affected"
            },
            {
              "version": "11.0(5)SR3",
              "status": "affected"
            },
            {
              "version": "11.0(3)",
              "status": "affected"
            },
            {
              "version": "11.0(5)SR2",
              "status": "affected"
            },
            {
              "version": "11.0(3)SR6",
              "status": "affected"
            },
            {
              "version": "11.0(5)SR1",
              "status": "affected"
            },
            {
              "version": "11.0(4)SR2",
              "status": "affected"
            },
            {
              "version": "11.0(3)SR1",
              "status": "affected"
            },
            {
              "version": "11.0(3)SR5",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Cisco",
          "product": "Cisco Small Business IP Phones",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "7.4.8",
              "status": "affected"
            },
            {
              "version": "7.4.3",
              "status": "affected"
            },
            {
              "version": "7.5.5a",
              "status": "affected"
            },
            {
              "version": "7.3.7",
              "status": "affected"
            },
            {
              "version": "7.5.2",
              "status": "affected"
            },
            {
              "version": "7.5.1",
              "status": "affected"
            },
            {
              "version": "7.4.6",
              "status": "affected"
            },
            {
              "version": "7.5.7",
              "status": "affected"
            },
            {
              "version": "7.4.4",
              "status": "affected"
            },
            {
              "version": "7.6.2SR3",
              "status": "affected"
            },
            {
              "version": "7.6.2",
              "status": "affected"
            },
            {
              "version": "7.5.6",
              "status": "affected"
            },
            {
              "version": "7.5.6c",
              "status": "affected"
            },
            {
              "version": "7.6.0",
              "status": "affected"
            },
            {
              "version": "7.4.7",
              "status": "affected"
            },
            {
              "version": "7.6.2SR6",
              "status": "affected"
            },
            {
              "version": "7.5.2b",
              "status": "affected"
            },
            {
              "version": "7.5.5",
              "status": "affected"
            },
            {
              "version": "7.5.6a",
              "status": "affected"
            },
            {
              "version": "7.6.2SR2",
              "status": "affected"
            },
            {
              "version": "7.5.3",
              "status": "affected"
            },
            {
              "version": "7.5.2a",
              "status": "affected"
            },
            {
              "version": "7.5.6(XU)",
              "status": "affected"
            },
            {
              "version": "7.5.7s",
              "status": "affected"
            },
            {
              "version": "7.6.2SR4",
              "status": "affected"
            },
            {
              "version": "7.6.2SR1",
              "status": "affected"
            },
            {
              "version": "7.4.9",
              "status": "affected"
            },
            {
              "version": "7.5.5b",
              "status": "affected"
            },
            {
              "version": "7.6.2SR5",
              "status": "affected"
            },
            {
              "version": "7.5.4",
              "status": "affected"
            },
            {
              "version": "7.6.1",
              "status": "affected"
            },
            {
              "version": "7.6.2SR7",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}