How severe is CVE-2025-26397?

CVE-2025-26397 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-26397 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-26397?

CVE-2025-26397 affects Solarwinds Observability Self-hosted. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-26397?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-26397 have an EU (EUVD) identifier?

Yes. CVE-2025-26397 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22489.

When was CVE-2025-26397 published?

CVE-2025-26397 was published on 2025-07-24 and last updated on 2026-06-17.

CVE-2025-26397

CVE-2025-26397 is a high-severity vulnerability in Solarwinds Observability Self-hosted with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22489
Weakness: CWE-502
Affected product: Solarwinds Observability Self-hosted
Published: 2025-07-24
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-26397?: CVE-2025-26397 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-26397 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-26397?: CVE-2025-26397 affects Solarwinds Observability Self-hosted. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-26397?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-26397 have an EU (EUVD) identifier?: Yes. CVE-2025-26397 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22489.
When was CVE-2025-26397 published?: CVE-2025-26397 was published on 2025-07-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:solarwinds:observability_self-hosted:*:*:*:*:*:*:*:*

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