---
title: "SolarWinds Orion supply-chain compromise"
description: "What the retained public evidence establishes about the SolarWinds Orion incident, its attack path, impact, and response."
incident_type: "Cybersecurity incident"
status: "active"
last_modified: "2026-09-19"
canonical_url: "https://www.ally.security/incidents/solarwinds-orion-supply-chain-compromise-2020"
markdown_url: "https://www.ally.security/incidents/solarwinds-orion-supply-chain-compromise-2020.md"
stix_url: "https://www.ally.security/incidents/solarwinds-orion-supply-chain-compromise-2020/stix.json"
---

# SolarWinds Orion supply-chain compromise

The reviewed public source documents a cybersecurity incident involving SolarWinds Orion, while leaving material details unresolved.

Last modified Sep 19, 2026 · 1 source

## Summary

- **Environment:** IT software supply chain
- **Operational impact:** The reviewed source does not establish a precise operational or data impact
- **Financial impact:** No financial figure is established by the reviewed source evidence

## What happened

The reviewed public record documents a cybersecurity incident involving SolarWinds in Discovered Dec 2020; fallout through 2024. It does not establish the initial access path with enough specificity to describe it here. [1](#source-1)

## Impact

- The reviewed source does not establish a precise affected-person count, data scope, or operational consequence.
- No financial loss, ransom amount, recovery cost, or regulatory penalty is established by the reviewed source evidence.

## Timeline

### December 14, 2020 — Documented public update

The [Active exploitation of SolarWinds software](https://www.cisa.gov/news-events/alerts/2020/12/13/active-exploitation-solarwinds-software) records the incident facts used in this briefing. [1](#source-1)

### September 19, 2026 — Briefing updated

This briefing was last reviewed and updated on September 19, 2026.

## Threat Group & Attack Vector

The reviewed source does not establish a sufficiently specific initial-access vector. The article therefore does not infer credentials, malware, a vulnerability, or a social-engineering path.

### Actors

- No threat actor group has been identified in the reviewed public evidence.

### TTPs

- No specific MITRE ATT\&CK technique is currently mapped for this case.

## Response

The reviewed source does not describe containment, notification, or restoration steps in enough detail to summarize them responsibly.

This account is bounded to [Active exploitation of SolarWinds software](https://www.cisa.gov/news-events/alerts/2020/12/13/active-exploitation-solarwinds-software). Details absent from that evidence are left unresolved rather than inferred. [1](#source-1)

## Assets

[Download the case-scoped STIX 2.1 bundle](<https://www.ally.security/incidents/solarwinds-orion-supply-chain-compromise-2020/stix.json>)

## Sources

Primary source records used to research this incident.

<a id="source-1"></a>

### Active exploitation of SolarWinds software

advisory · CISA

<https://www.cisa.gov/news-events/alerts/2020/12/13/active-exploitation-solarwinds-software>

<details>
<summary>Evidence ledger</summary>

Review the supporting structured claims.

1. **Affected Organization · 100% confidence · current**  
   SolarWinds Orion supply-chain compromise: SolarWinds
2. **Resulted In · 100% confidence · current**  
   SolarWinds Orion supply-chain compromise: The reviewed source documents the solarwinds orion supply-chain compromise involving SolarWinds.
3. **Occurred At · 100% confidence · current**  
   Documented public update: 2020-12-14

</details>