CVE-2007-1286

Status: ModifiedMedium (6.8)—Exploit

Severity6.8Medium · CVSS 2.0

Exploitation probability41 %higher than 99% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB · Metasploit module (reliable, widely available exploit)

Integer overflow in PHP 4.4.4 and earlier allows remote context-dependent attackers to execute arbitrary code via a long string to the unserialize function, which triggers the overflow in the ZVAL reference counter.

CVSS

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

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 41 %
Percentile among all scored CVEs: 99
Score date: 10/22/2026

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.

Metasploit module (reliable, widely available exploit) · PHP 4 unserialize() ZVAL Reference Counter Overflow (Cookie)
Published on Exploit-DB · PHP 4 - Unserialize() ZVAL Reference Counter Overflow (Cookie) (Metasploit) (9/20/2010)
Published on Exploit-DB · PHP 4.4.4 - 'Unserialize()' ZVAL Reference Counter Overflow (PoC) (3/2/2007)
Published on Exploit-DB · PHP < 4.5.0 - Unserialize Overflow (Metasploit) (3/1/2007)

Affected technologies (1)

PHP — PHP

CWEs

NVD-CWE-Other

References

Show 64 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2007-1286",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "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": true,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
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    }
  ],
  "published": "2007-03-06T20:19:00.000",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Integer overflow in PHP 4.4.4 and earlier allows remote context-dependent attackers to execute arbitrary code via a long string to the unserialize function, which triggers the overflow in the ZVAL reference counter."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de entero en PHP 4.4.4 y anteriores permiten a atacantes dependientes de contexto ejecutar código de su elección mediante el paso de una cadena larga a la función unserialize, lo cual provoca el desbordamiento en el contador de referencias ZVAL."
    }
  ],
  "lastModified": "2026-06-16T22:37:17.753",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "matchCriteriaId": "C84850F4-17C8-4525-8C7A-1C1E8454753B",
              "versionEndIncluding": "4.4.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}