NCSC-2026-0151

Vulnerability from csaf_ncscnl - Published: 2026-05-13 09:23 - Updated: 2026-05-13 09:23
Summary
Kwetsbaarheden verholpen in Adobe Connect
Notes
The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten: Adobe heeft kwetsbaarheden verholpen in Adobe Connect versies 2025.9.15, 2025.8.157 en eerdere versies.
Interpretaties: De kwetsbaarheden maken het mogelijk voor een aanvaller om willekeurige code uit te voeren op het getroffen systeem. Dit kan gebeuren wanneer een gebruiker interactie heeft met een kwaadaardige URL of een gecompromitteerde webpagina. De eerste kwetsbaarheid betreft deserialisatie van onbetrouwbare data, waarbij onjuiste verwerking van geserialiseerde data kan leiden tot manipulatie van het applicatiegedrag. De tweede kwetsbaarheid betreft onjuiste autorisatiecontroles, waardoor ongeautoriseerde uitvoering van scripts mogelijk is. Beide kwetsbaarheden zijn aanwezig in meerdere recente versies van Adobe Connect.
Oplossingen: Adobe heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-502: Deserialization of Untrusted Data
CWE-863: Incorrect Authorization
CVE-2026-34659

Adobe Connect versions 2025.9.15, 2025.8.157, and earlier contain a Deserialization of Untrusted Data vulnerability enabling arbitrary code execution via user interaction with malicious URLs or compromised web pages.

9.6 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE-502 - Deserialization of Untrusted Data
Affected products
Product Identifier Version Remediation
vers:unknown/*
Adobe / Adobe Connect
 vers:unknown/*
vers:unknown/*
Adobe / Connect Desktop Application
 vers:unknown/*
CVE-2026-34660

Adobe Connect versions 2025.9.15, 2025.8.157, and earlier contain an Incorrect Authorization vulnerability enabling attackers to execute arbitrary code via malicious script injection requiring user interaction through crafted URLs or compromised web pages.

9.3 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CWE-863 - Incorrect Authorization
Affected products
Product Identifier Version Remediation
vers:unknown/*
Adobe / Adobe Connect
 vers:unknown/*
vers:unknown/*
Adobe / Connect Desktop Application
 vers:unknown/*
References
To clipboard 

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        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
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      },
      {
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        "title": "Interpretaties"
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    "title": "Kwetsbaarheden verholpen in Adobe Connect",
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}


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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.