Plateforme
windows
Composant
serv-u
Corrigé dans
15.5.3
CVE-2025-40548 describes a Remote Code Execution (RCE) vulnerability within SolarWinds Serv-U. This flaw allows a malicious actor with administrative privileges to execute arbitrary code on the affected system. The vulnerability impacts versions of Serv-U up to and including 15.5.2. A patch is available in version 15.5.3.
Successful exploitation of CVE-2025-40548 grants an attacker complete control over the affected system. An attacker with administrative privileges can execute arbitrary code, potentially leading to data exfiltration, system compromise, and lateral movement within the network. The impact is particularly severe given Serv-U's role in file transfer and potential access to sensitive data. While the Windows default service account configuration mitigates the risk slightly, administrative access remains a critical concern. This vulnerability could be leveraged to install malware, create backdoors, or disrupt operations.
CVE-2025-40548 was published on 2025-11-18. Public proof-of-concept code is currently unavailable, but the CRITICAL CVSS score and the potential for RCE suggest a high likelihood of exploitation. The vulnerability has been added to the CISA KEV catalog, indicating a significant risk to federal civilian agencies. Active campaigns targeting Serv-U are not currently confirmed, but the ease of exploitation once a PoC is released warrants close monitoring.
Organizations heavily reliant on SolarWinds Serv-U for file transfers, particularly those with legacy configurations or shared hosting environments, are at increased risk. Environments where Serv-U is deployed with overly permissive administrative accounts are especially vulnerable. Businesses handling sensitive data through Serv-U should prioritize patching.
• windows / supply-chain:
Get-Process -Name ServU | Select-Object -ExpandProperty Path• windows / supply-chain:
Get-WinEvent -LogName Application -Filter "EventID=1000 -ProviderName SolarWinds Serv-U" -Tail 10• windows / supply-chain: Check Autoruns for unusual entries related to Serv-U startup. • windows / supply-chain: Use Sysinternals Process Monitor to observe Serv-U's file access patterns for anomalies.
disclosure
patch
kev
Statut de l'Exploit
EPSS
0.07% (percentile 22%)
CISA SSVC
Vecteur CVSS
The primary mitigation for CVE-2025-40548 is to upgrade to SolarWinds Serv-U version 15.5.3 or later. If an immediate upgrade is not feasible, consider restricting administrative access to Serv-U and implementing strict network segmentation to limit the potential blast radius. Review Serv-U's configuration to ensure it adheres to the principle of least privilege. While a direct WAF rule is unlikely to be effective, monitoring network traffic for suspicious connections to Serv-U on unusual ports could provide early detection. After upgrading, confirm the fix by attempting to trigger the vulnerable functionality and verifying that it is no longer exploitable.
Actualice SolarWinds Serv-U a la versión 15.5.3 o posterior. Esta actualización corrige la vulnerabilidad de ejecución remota de código causada por un control de acceso roto. La actualización está disponible en el sitio web de SolarWinds.
Analyses de vulnérabilités et alertes critiques directement dans votre boîte mail.
CVE-2025-40548 is a critical Remote Code Execution vulnerability in SolarWinds Serv-U versions up to 15.5.2. It allows attackers with admin privileges to execute code on the system.
You are affected if you are running SolarWinds Serv-U versions 15.5.2 or earlier. Upgrade to 15.5.3 or later to mitigate the risk.
Upgrade to SolarWinds Serv-U version 15.5.3 or later. If immediate upgrade is not possible, restrict administrative access and implement network segmentation.
Active exploitation is not currently confirmed, but the high CVSS score and potential for RCE suggest a high likelihood of exploitation. Monitor for suspicious activity.
Refer to the official SolarWinds security advisory for detailed information and updates: [https://www.solarwinds.com/securityadvisories](https://www.solarwinds.com/securityadvisories)
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