CVE-2025-26397: observability Insecure Deserialization

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.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-502 Deserialization of Untrusted Data

Affected Products

Vendor	Product	Versions
solarwinds	observability_self-hosted	< 2025.2.1

References

Advisories & Patches

https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26397

Other References

https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/solarwinds_platform_2025-2-1_release_notes.htm

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-26397? +

CVE-2025-26397 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-26397? +

CVE-2025-26397 affects products from solarwinds, specifically: observability_self-hosted. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-26397? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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