FKIE_CVE-2026-34352

Vulnerability from fkie_nvd - Published: 2026-03-26 23:16 - Updated: 2026-06-04 16:16
Severity
8.5 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.
References
cve@mitre.orghttps://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393Patch
cve@mitre.orghttps://github.com/TigerVNC/tigervnc/issues/2079
cve@mitre.orghttps://groups.google.com/g/tigervnc-announce/c/anHL9WLshLIMailing List, Patch
cve@mitre.orghttps://sourceforge.net/projects/tigervnc/files/stable/1.16.2Release Notes
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2026/03/26/7Mailing List, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/TigerVNC/tigervnc/issues/2079
Impacted products
Vendor Product Version
tigervnc tigervnc *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A1D26886-0F31-44FB-8112-F07B18A7ACDA",
              "versionEndExcluding": "1.16.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions."
    },
    {
      "lang": "es",
      "value": "En TigerVNC anterior a 1.16.2, Image.cxx en x0vncserver permite a otros usuarios observar o manipular el contenido de la pantalla, o causar un fallo de la aplicaci\u00f3n, debido a permisos incorrectos."
    }
  ],
  "id": "CVE-2026-34352",
  "lastModified": "2026-06-04T16:16:34.877",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 8.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.3,
        "source": "cve@mitre.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-26T23:16:20.903",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/TigerVNC/tigervnc/issues/2079"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Patch"
      ],
      "url": "https://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ],
      "url": "https://sourceforge.net/projects/tigervnc/files/stable/1.16.2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://www.openwall.com/lists/oss-security/2026/03/26/7"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/TigerVNC/tigervnc/issues/2079"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-732"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.