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CVE-2026-48840

Estado: ModificadaMedia (5.3)—

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Exim — Exim

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-48840",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-48840",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-01T12:51:07.836512Z"
        }
      }
    ],
    "cvssMetricV31": [
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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  "affected": [
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          "repo": "https://code.exim/org/exim/exim",
          "vendor": "Exim",
          "product": "Exim",
          "versions": [
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              "version": "4.88",
              "lessThan": "4.99.4",
              "versionType": "custom"
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  "published": "2026-05-30T02:16:19.790",
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      "tags": [
        "Vendor Advisory"
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    {
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        "Third Party Advisory"
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      "url": "https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-839"
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      "lang": "en",
      "value": "Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client."
    },
    {
      "lang": "es",
      "value": "Exim 4.88 antes de 4.99.4, en algunas configuraciones de proxy, maneja incorrectamente ciertas cargas útiles cortas, lo que lleva a la divulgación de valores de memoria de pila no inicializados a un cliente."
    }
  ],
  "lastModified": "2026-07-22T06:10:00.170",
  "configurations": [
    {
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}