CVE-2007-1649

Status: ModifiedHigh (7.8)—Exploit

Severity7.8High · CVSS 2.0

Exploitation probability7.49 %higher than 94% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

PHP 5.2.1 allows context-dependent attackers to read portions of heap memory by executing certain scripts with a serialized data input string beginning with S:, which does not properly track the number of input bytes being processed.

CVSS

Base score: 7.8
Version: 2.0
Vector: AV:N/AC:L/Au:N/C:C/I:N/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 7.49 %
Percentile among all scored CVEs: 94
Score date: 10/24/2026

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 · PHP 5.2.1 - 'Unserialize()' Local Information Leak (3/23/2007)

Affected technologies (1)

PHP — PHP

CWEs

NVD-CWE-Other

References

Show 12 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2007-1649",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2007-03-24T00:19:00.000",
  "references": [
    {
      "url": "http://secunia.com/advisories/24630",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://us2.php.net/releases/5_2_2.php",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2008:126",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.php-security.org/MOPB/MOPB-29-2007.html",
      "tags": [
        "Exploit"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/23105",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/33170",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/24630",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://us2.php.net/releases/5_2_2.php",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2008:126",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.php-security.org/MOPB/MOPB-29-2007.html",
      "tags": [
        "Exploit"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/23105",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/33170",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "PHP 5.2.1 allows context-dependent attackers to read portions of heap memory by executing certain scripts with a serialized data input string beginning with S:, which does not properly track the number of input bytes being processed."
    },
    {
      "lang": "es",
      "value": "PHP 5.2.1 permite a atacantes depedientes del contexto leer porciones de la cabecera de memoria a través de la ejecución de ciertos scripts con datos de entrada serializados que comienzan con S:, lo cual no sigue adecuadamente el número de entradas de bytes que han sido procesados."
    }
  ],
  "lastModified": "2026-06-16T22:38:01.620",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "88358D1E-BE6F-4CE3-A522-83D1FA4739E3"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "vendorComments": [
    {
      "comment": "Not vulnerable. These issues did not affect the versions of PHP as\nshipped with Red Hat Enterprise Linux 2.1, 3, 4, 5, Stronghold 4.0, or\nRed Hat Application Stack 1.\n",
      "lastModified": "2007-04-16T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}