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.

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-protec…

Vulnerability class: Insecure Deserialization

EPSS: 0.001 (30.6th percentile) — read the EPSS interpretation.

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.

Affected products

Solarwinds Observability Self-hosted — versions 2025.2 and previous versions

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

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.