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CVE-2001-0537 (GCVE-0-2001-0537)

Vulnerability from cvelistv5 – Published: 2002-03-09 05:00 – Updated: 2024-08-08 04:21
VLAI Shadowserver Previdian
Summary
HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being used, by specifying a high access level in the URL.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
URL Tags
http://www.cert.org/advisories/CA-2001-14.html third-party-advisoryx_refsource_CERT
http://www.securityfocus.com/archive/1/4.3.2.7.2.… mailing-listx_refsource_BUGTRAQ
http://www.cisco.com/warp/public/707/IOS-httpleve… vendor-advisoryx_refsource_CISCO
http://www.securityfocus.com/archive/1/2001070301… mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/archive/1/1601227034… mailing-listx_refsource_BUGTRAQ
http://www.osvdb.org/578 vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/archive/1/Pine.LNX.3… mailing-listx_refsource_BUGTRAQ
http://www.ciac.org/ciac/bulletins/l-106.shtml third-party-advisorygovernment-resourcex_refsource_CIAC
http://www.securityfocus.com/bid/2936 vdb-entryx_refsource_BID
https://exchange.xforce.ibmcloud.com/vulnerabilit… vdb-entryx_refsource_XF
Date Public
2001-06-27 00:00
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bb558845-2e34-4e18-ada4-d63fcf65a92d

Vulnerability ID: CVE-2001-0537

Status: Confirmed

Status Updated: 2026-07-20 00:00 UTC

Exploited: Yes

Characteristics
Severity: 93.0
Timestamps
First Seen: 2023-10-14
Asserted: 2023-10-14
Last Seen: 2026-07-20
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Cisco / Cisco IOS | Class: router | Severity: High (CVSS 9.3) | IoT: no | In CISA KEV: no | Honeypot connections on 2026-07-20: 18
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class router
7D Avg 1
Vendor Cisco
30D Avg 8
90D Avg 5
Product Cisco IOS
Cisa Kev no
Connections 18
Observation Date 2026-07-20
Vulnerability Class CVSS
Vulnerability Score 9.3
Vulnerability Severity High
References
Created: 2026-06-30 09:22 UTC | Updated: 2026-07-22 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 322b53b6-c502-4fb7-9411-2cd7722a1afb

Vulnerability ID: CVE-2001-0537

Status: Confirmed

Status Updated: 2025-06-21 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-06-21
Asserted: 2025-06-21
Scope
Notes: KEVIntel entry: HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being... | Affected: Cisco / IOS | CVSS: 9.3 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being...
Vendor Cisco
Product IOS
Added Date 2025-06-21T00:00:00.000Z
Cvss Score 9.3
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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          "lang": "en",
          "value": "HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being used, by specifying a high access level in the URL."
        }
      ],
      "id": "CVE-2001-0537",
      "lastModified": "2024-11-20T23:35:35.750",
      "metrics": {
        "cvssMetricV2": [
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            "acInsufInfo": false,
            "baseSeverity": "HIGH",
            "cvssData": {
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              "accessVector": "NETWORK",
              "authentication": "NONE",
              "availabilityImpact": "COMPLETE",
              "baseScore": 9.3,
              "confidentialityImpact": "COMPLETE",
              "integrityImpact": "COMPLETE",
              "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
              "version": "2.0"
            },
            "exploitabilityScore": 8.6,
            "impactScore": 10.0,
            "obtainAllPrivilege": true,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
          }
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      "references": [
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                ],
                "negate": false,
                "operator": "OR"
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            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being used, by specifying a high access level in the URL."
          }
        ],
        "id": "CVE-2001-0537",
        "lastModified": "2026-04-16T00:27:16.627",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 9.3,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 10.0,
              "obtainAllPrivilege": true,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2001-07-21T04:00:00.000",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Patch",
              "Third Party Advisory",
              "US Government Resource"
            ],
            "url": "http://www.cert.org/advisories/CA-2001-14.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.ciac.org/ciac/bulletins/l-106.shtml"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.cisco.com/warp/public/707/IOS-httplevel-pub.html"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.osvdb.org/578"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.securityfocus.com/archive/1/1601227034.20010702112207%40olympos.org"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.securityfocus.com/archive/1/20010703011650.60515.qmail%40web14910.mail.yahoo.com"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.securityfocus.com/archive/1/4.3.2.7.2.20010629095801.0c3e6a70%40brussels.cisco.com"
          },
          {
            "source": "cve@mitre.org",
            "url": "http://www.securityfocus.com/archive/1/Pine.LNX.3.96.1010702134611.22995B-100000%40Lib-Vai.lib.asu.edu"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.securityfocus.com/bid/2936"
          },
          {
            "source": "cve@mitre.org",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/6749"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Patch",
              "Third Party Advisory",
              "US Government Resource"
            ],
            "url": "http://www.cert.org/advisories/CA-2001-14.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.ciac.org/ciac/bulletins/l-106.shtml"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.cisco.com/warp/public/707/IOS-httplevel-pub.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.osvdb.org/578"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securityfocus.com/archive/1/1601227034.20010702112207%40olympos.org"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securityfocus.com/archive/1/20010703011650.60515.qmail%40web14910.mail.yahoo.com"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securityfocus.com/archive/1/4.3.2.7.2.20010629095801.0c3e6a70%40brussels.cisco.com"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.securityfocus.com/archive/1/Pine.LNX.3.96.1010702134611.22995B-100000%40Lib-Vai.lib.asu.edu"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.securityfocus.com/bid/2936"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/6749"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-287"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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Tags
Taxonomy of the tags.





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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.