CISA Adds Actively Exploited SolarWinds Serv-U DoS Flaw to KEV Catalog
In early June 2026, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a high-severity vulnerability, CVE-2026-28318, affecting SolarWinds Serv-U, to its Known Exploited Vulnerabilities (KEV) catalog. This denial-of-service (DoS) flaw allows unauthenticated attackers to crash the Serv-U service by sending specially crafted POST requests with the 'Content-Encoding: deflate' header. The vulnerability has a CVSS score of 7.5 and is actively being exploited in the wild. ([nvd.nist.gov](https://nvd.nist.gov/vuln/detail/CVE-2026-28318?utm_source=openai)) The inclusion of this vulnerability in the KEV catalog underscores the critical need for organizations to promptly apply security patches. Unpatched systems remain susceptible to service disruptions, which can have significant operational and financial impacts. ([scworld.com](https://www.scworld.com/brief/hackers-actively-exploit-solarwinds-serv-u-flaw-to-crash-servers-cisa-warns?utm_source=openai))
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