CVE-2016-9934

Status: ModifiedHigh (7.5)—
ext/wddx/wddx.c in PHP before 5.6.28 and 7.x before 7.0.13 allows remote attackers to cause a denial of service (NULL pointer dereference) via crafted serialized data in a wddxPacket XML document, as demonstrated by a PDORow string.
CVSS

Version: 3.0
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base score: 7.5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 6.79%
Percentile among all scored CVEs: 94
Score date: 10/18/2026
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).
Affected technologies (1)

PHP — PHP
CWEs

CWE-476
References

Raw JSON (NVD)

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{
  "id": "CVE-2016-9934",
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          "authentication": "NONE",
          "integrityImpact": "NONE",
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          "confidentialityImpact": "NONE"
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      "value": "ext/wddx/wddx.c in PHP before 5.6.28 and 7.x before 7.0.13 allows remote attackers to cause a denial of service (NULL pointer dereference) via crafted serialized data in a wddxPacket XML document, as demonstrated by a PDORow string."
    },
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  "lastModified": "2026-06-17T00:56:48.147",
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