Deserialization in Solarwinds Observability Self-Hosted
CVE-2025-26397
SolarWinds Observability Self-Hosted is susceptible to Deserialization of Untrusted Data Local Privilege Escalation vulnerability. An attacker with low privileges can escalate privileges to run malicious files copied to a permission-protected folder. This vulnerability requires authentication from a low-level account and local access to the host server.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Solarwinds Observability Self-Hosted
- Solarwinds Observability Self-Hosted — versions 2025.2 and previous versions
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.solarwinds.com/trust-center/security-advisories/CVE-2025-26397 (Patch, Vendor Advisory)
- documentation.solarwinds.com/en/success_center/orionplatform/content/release_no… (Release Notes)
Frequently asked questions
- What is CVE-2025-26397?
- CVE-2025-26397 is a high-severity vulnerability in Solarwinds Observability Self-Hosted, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2025-07-24.
- How severe is CVE-2025-26397?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2025-26397 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.