CVE-2025-26397

SYSTEM code execution via localhost TFTP deserialization

Published Jul 24, 2025 · Updated Jul 24, 2025

Deserialization in SolarWinds Observability Self-Hosted 2025.2 and earlier allows local users to execute code as SYSTEM. The internal TFTP communications endpoint on localhost TCP port 8099 fails to validate user-supplied data before deserializing it. Exploitation requires authenticated low-privilege code execution on the host and yields full SYSTEM-context execution.

CVSS severity7.8
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in SolarWinds Observability Self-Hosted 2025.2 and earlier allows local users to execute code as SYSTEM. The internal TFTP communications endpoint on localhost TCP port 8099 fails to validate user-supplied data before deserializing it. Exploitation requires authenticated low-privilege code execution on the host and yields full SYSTEM-context execution.

The record

CVE
CVE-2025-26397
Published
Jul 24, 2025
Updated
Jul 24, 2025
Vendor
SolarWinds
Product
SolarWinds Observability Self-Hosted
Classifications
CWE-502, CAPEC-586, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2025.2 and previous versions

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

SolarWinds · SolarWinds Observability Self-Hostedversion=2025.2 and previous versions

Published CVSS scores

7.8SolarWindsCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CAPEC-586Object Injection
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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