SolarWinds Serv-U Path Traversal Vulnerability
SolarWinds Serv-U was susceptible to a directory transversal vulnerability that would allow access to read sensitive files on the host machine.
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)17 Jul 2024
- Exploited in EUVD (ENISA)17 Jul 2024
- Used by ransomwareno
- EPSS above 10 %99.6%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Affected products
- 15.4.2 HF 1 and previous versions
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 99.6%
References
Other exploited vulnerabilities from the same vendor
- CVE-2026-28318SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability6.7 · Actively exploited
- CVE-2025-26399SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability9.6 · Background exploitation
- CVE-2025-40536SolarWinds Web Help Desk Security Control Bypass Vulnerability7.8 · Background exploitation
- CVE-2025-40551SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability8.8 · Background exploitation
- CVE-2024-28987SolarWinds Web Help Desk Hardcoded Credential Vulnerability8.8 · Background exploitation
- CVE-2024-28986SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability8.9 · Background exploitation