WID-SEC-W-2026-0706

Vulnerability from csaf_certbund - Published: 2026-03-11 23:00 - Updated: 2026-03-11 23:00
Summary
Cisco IOS XR: Mehrere Schwachstellen
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Cisco Internetwork Operating System (IOS) ist ein Betriebssystem, das für Cisco Geräte wie z. B. Router und Switches eingesetzt wird.
Angriff: Ein Angreifer kann mehrere Schwachstellen in Cisco IOS XR ausnutzen, um seine Privilegien zu erhöhen, um beliebigen Code mit root-rechten auszuführen, und um einen Denial of Service Angriff durchzuführen.
Betroffene Betriebssysteme: - Sonstiges
CVE-2026-20046
Affected products
Product Identifier Version Remediation
Cisco IOS XR <25.2.2
Cisco / IOS XR
 <25.2.2
CVE-2026-20074
Affected products
Product Identifier Version Remediation
Cisco IOS XR <25.3.1
Cisco / IOS XR
 <25.3.1
Cisco IOS XR <25.2.2
Cisco / IOS XR
 <25.2.2
CVE-2026-20118
Affected products
Product Identifier Version Remediation
Cisco IOS XR
Cisco / IOS XR
 cpe:/o:cisco:ios_xr:- —
CVE-2026-20040
Affected products
Product Identifier Version Remediation
Cisco IOS XR <25.2.21
Cisco / IOS XR
 <25.2.21
Cisco IOS XR
Cisco / IOS XR
 cpe:/o:cisco:ios_xr:- —
Cisco IOS XR <25.3.1
Cisco / IOS XR
 <25.3.1
Cisco IOS XR <25.4.2
Cisco / IOS XR
 <25.4.2
Cisco IOS XR <25.2.2
Cisco / IOS XR
 <25.2.2
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Cisco Internetwork Operating System (IOS) ist ein Betriebssystem, das f\u00fcr Cisco Ger\u00e4te wie z. B. Router und Switches eingesetzt wird.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in Cisco IOS XR ausnutzen, um seine Privilegien zu erh\u00f6hen, um beliebigen Code mit root-rechten auszuf\u00fchren, und um einen Denial of Service Angriff durchzuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0706 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0706.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0706 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0706"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2026-03-11",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-privesc-bF8D5U4W"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2026-03-11",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-isis-dos-kDMxpSzK"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory vom 2026-03-11",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrncs-epni-int-dos-TWMffUsN"
      }
    ],
    "source_lang": "en-US",
    "title": "Cisco IOS XR: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-03-11T23:00:00.000+00:00",
      "generator": {
        "date": "2026-03-12T11:36:43.763+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-0706",
      "initial_release_date": "2026-03-11T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-03-11T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Cisco IOS XR",
                "product": {
                  "name": "Cisco IOS XR",
                  "product_id": "T051638",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:-"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c25.2.21",
                "product": {
                  "name": "Cisco IOS XR \u003c25.2.21",
                  "product_id": "T051681"
                }
              },
              {
                "category": "product_version",
                "name": "25.2.21",
                "product": {
                  "name": "Cisco IOS XR 25.2.21",
                  "product_id": "T051681-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:25.2.21"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c25.4.2",
                "product": {
                  "name": "Cisco IOS XR \u003c25.4.2",
                  "product_id": "T051682"
                }
              },
              {
                "category": "product_version",
                "name": "25.4.2",
                "product": {
                  "name": "Cisco IOS XR 25.4.2",
                  "product_id": "T051682-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:25.4.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c25.2.2",
                "product": {
                  "name": "Cisco IOS XR \u003c25.2.2",
                  "product_id": "T051683"
                }
              },
              {
                "category": "product_version",
                "name": "25.2.2",
                "product": {
                  "name": "Cisco IOS XR 25.2.2",
                  "product_id": "T051683-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:25.2.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c25.3.1",
                "product": {
                  "name": "Cisco IOS XR \u003c25.3.1",
                  "product_id": "T051684"
                }
              },
              {
                "category": "product_version",
                "name": "25.3.1",
                "product": {
                  "name": "Cisco IOS XR 25.3.1",
                  "product_id": "T051684-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:cisco:ios_xr:25.3.1"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "IOS XR"
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-20046",
      "product_status": {
        "known_affected": [
          "T051683"
        ]
      },
      "release_date": "2026-03-11T23:00:00.000+00:00",
      "title": "CVE-2026-20046"
    },
    {
      "cve": "CVE-2026-20074",
      "product_status": {
        "known_affected": [
          "T051684",
          "T051683"
        ]
      },
      "release_date": "2026-03-11T23:00:00.000+00:00",
      "title": "CVE-2026-20074"
    },
    {
      "cve": "CVE-2026-20118",
      "product_status": {
        "known_affected": [
          "T051638"
        ]
      },
      "release_date": "2026-03-11T23:00:00.000+00:00",
      "title": "CVE-2026-20118"
    },
    {
      "cve": "CVE-2026-20040",
      "product_status": {
        "known_affected": [
          "T051681",
          "T051638",
          "T051684",
          "T051682",
          "T051683"
        ]
      },
      "release_date": "2026-03-11T23:00:00.000+00:00",
      "title": "CVE-2026-20040"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.