---
title: "Tag: zero-day"
description: "1 blog entry tagged zero-day, newest first, each with published and updated dates."
url: https://policycortex.com/blog/tags/zero-day
sealed: 2026-10-22
amended: 2026-10-22
register: blog/tags/zero-day
records: 3
digest: sha3:4cb8b0ad259eec01cb518daa489b656b7798b2c4ff42a02198b17bcd3dbd4d16
---

# Blog entries tagged zero-day

Resources / Blog / Tag: zero-day

Every blog entry tagged zero-day, newest first. Tags group the blog by subject so a reader working one requirement can follow it across entries as the rules change. Each entry shows when it was published and last updated; every entry is listed on the blog index.

1 entry · Last published 2026-10-22

## Entries, newest first

| Published | Entry | Reading |
|---|---|---|
| 2026-10-22 | [Arista VeloCloud Orchestrator Zero-Day: A Signed-In User Becomes Superuser](https://policycortex.com/blog/arista-vco-zero-day-superuser-escalation): Arista confirms active exploitation of the on-premises VeloCloud Orchestrator flaw. | 5 min |

## Related records

Guides and articles describe the work. The evidence that work produces is described in three proof pages and one architecture page.

- **proof.state**: [Proof of State](https://policycortex.com/proof/state). What the environment was, as of a date someone else picks: point-in-time records, content hashed and chained.
- **proof.change**: [Proof of Change](https://policycortex.com/proof/change). Who or what altered the environment, under what authority, with before and after state hashes.
- **proof.agency**: [Proof of Agency](https://policycortex.com/proof/agency). What a machine was permitted to do before it acted, what it did, and what would have stopped it.
- **architecture**: [Architecture](https://policycortex.com/architecture). How the chain is built and where it lives: inside your tenant, with no egress of evidence.

Read the entries. Then verify the record they describe. [Request Access](https://app.policycortex.com/auth?mode=request-access) · [Book a call](https://policycortex.com/book)

## Register colophon

| Seq | Label | SHA3-256 | Prev |
|---|---|---|---|
| REC 0000 | HEAD | 0a1649bb295f | f158c0cd36d4 |
| REC 0001 | ENTRIES | 314e3ef4cb01 | 0a1649bb295f |
| REC 0002 | RELATED RECORDS | 4cb8b0ad259e | 314e3ef4cb01 |

Head sha3:4cb8b0ad259eec01cb518daa489b656b7798b2c4ff42a02198b17bcd3dbd4d16. Each digest is SHA3-256 over the previous digest, the register key, the record label, and the record copy; a second party can recompute it from this document.