CVE-2009-1561

Status: ModifiedMedium (6.8)—💥 Exploit

Cross-site request forgery (CSRF) vulnerability in administration.cgi on the Cisco Linksys WRT54GC router with firmware 1.05.7 allows remote attackers to hijack the intranet connectivity of arbitrary users for requests that change the administrator password via the sysPasswd and sysConfirmPasswd parameters.

CVSS

Version: 2.0
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Base score: 6.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 3.36%
Percentile among all scored CVEs: 88
Score date: 10/6/2026

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).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Linksys WRT54GC 1.5.7 Firmware - 'administration.cgi' Access Validation (4/20/2009)

Affected technologies (1)

Cisco — Wrt54gc

CWEs

CWE-352

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2009-1561",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2009-05-06T16:30:00.703",
  "references": [
    {
      "url": "http://archives.neohapsis.com/archives/bugtraq/2009-04/0198.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://packetstormsecurity.org/0904-exploits/linksysadmin-passwd.txt",
      "tags": [
        "Exploit"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/34805",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.falandodeseguranca.com/?p=17",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/34616",
      "tags": [
        "Exploit"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/1172",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://archives.neohapsis.com/archives/bugtraq/2009-04/0198.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://packetstormsecurity.org/0904-exploits/linksysadmin-passwd.txt",
      "tags": [
        "Exploit"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/34805",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.falandodeseguranca.com/?p=17",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/34616",
      "tags": [
        "Exploit"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/1172",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Cross-site request forgery (CSRF) vulnerability in administration.cgi on the Cisco Linksys WRT54GC router with firmware 1.05.7 allows remote attackers to hijack the intranet connectivity of arbitrary users for requests that change the administrator password via the sysPasswd and sysConfirmPasswd parameters."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de falsificación de petición en sitios cruzados (CSFR) en administration.cgi  en el router  Cisco Linksys WRT54GC con firmware v1.05.7, permite a atacantes remotos secuestrar la conectividad de la intranet de usuarios de su elección para peticiones que modifican la contraseña de administrador a través de los parámetros \"sysPasswd\" y \"sysConfirmPasswd\"."
    }
  ],
  "lastModified": "2026-06-16T23:07:31.630",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:cisco:wrt54gc:1.05.7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "14D5B1F5-59CF-469F-B889-A802E6262341"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}