KEV Lag Tracker → CVE-2026-16812. Data verified against the official CISA KEV catalog and the National Vulnerability Database.
CISA added CVE-2026-16812 (Arista VeloCloud Orchestrator) to the Known Exploited Vulnerabilities catalog on July 27, 2026. CISA listed it as actively exploited 0 days before its NVD publication date — exploitation was confirmed at or before public disclosure. A KEV listing is CISA’s official confirmation that a vulnerability is being exploited in the wild.
The Record
| CVE | CVE-2026-16812 |
| Vendor / product | Arista VeloCloud Orchestrator |
| Vulnerability | Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability |
| CVSS base score | 10 |
| NVD publication date | July 27, 2026 |
| Added to CISA KEV | July 27, 2026 |
| Lag (public → KEV listing) | 0 days |
| Federal patch deadline | July 30, 2026 |
| Known ransomware use | No |
Measured against the 1674 entries in our tracker with verified publication dates, CVE-2026-16812 was flagged faster than 87% of them.
What CISA Reported
CISA describes the flaw as follows: “Arista VeloCloud Orchestrator On-Prem contains an OS command injection vulnerability that may allow a remote attacker to access privileged internal functionality and impact the VCO host. Successful exploitation may compromise the confidentiality, integrity, and availability of the orchestrator and data managed by the orchestrator.”
Federal Patch Deadline
Under Binding Operational Directive rules, U.S. federal agencies must remediate CVE-2026-16812 by July 30, 2026 — a 3-day remediation window from the KEV listing date. Private organizations are not bound by that deadline; CISA treats it as the benchmark for how urgently a confirmed-exploited flaw should be patched.
What EPSS Forecast Before the Confirmation
EPSS had no score for CVE-2026-16812 on the day before CISA confirmed exploitation. That normally means the CVE had not yet been published when it was already being exploited — a case no forecast could have flagged. Its current EPSS probability is 1.57%. See the EPSS accuracy analysis for how often this happens.
How This Compares
We do not yet track enough Arista entries to publish a vendor median (the threshold is five with verified publication dates), so the reference here is the catalog as a whole:
| Across all tracked KEV entries | Value |
|---|---|
| Entries with verified publication dates | 1674 |
| Median lag (disclosure → KEV listing) | 266 days |
| Exploited within 7 days of disclosure | 24% |
| Tied to known ransomware campaigns | 20% |
Defense guide: How to Detect Zero-day Vulnerability: Attack Chain & Defense — detection signals, attack chain and response steps for this class of attack.
Frequently Asked Questions
What is CVE-2026-16812?
CVE-2026-16812 is a vulnerability in Arista VeloCloud Orchestrator (Arista VeloCloud Orchestrator On-Prem OS Command Injection Vulnerability) that CISA added to its Known Exploited Vulnerabilities catalog on July 27, 2026. A KEV listing is CISA’s official confirmation that the flaw is being exploited in the wild.
How long was CVE-2026-16812 public before CISA confirmed exploitation?
0 days before its NVD publication date — CISA listed it as exploited at or before the vulnerability was formally published, which is the signature of a zero-day.
What is the federal patch deadline for CVE-2026-16812?
U.S. federal agencies must remediate CVE-2026-16812 by July 30, 2026, a 3-day window from the KEV listing date. Private organizations are not bound by that deadline, but CISA treats it as the benchmark for how urgently a confirmed-exploited flaw should be patched.
Is CVE-2026-16812 used in ransomware campaigns?
CISA has not flagged CVE-2026-16812 as known to be used in ransomware campaigns. That field reflects confirmed campaign use, not the absence of risk.
Is a 0-day lag typical?
The median across all 1674 KEV entries we track with verified publication dates is 266 days, so CVE-2026-16812 is below the catalog median.
Related Coverage
- Critical Microsoft SharePoint Flaw CVE-2026-50522 (CVSS 9.8) Added to CISA KEV (July 2026)
- WordPress’s CVE-2026-63030 Was Exploited in 4 Days — Well Under Its 420-Day Median (July 2026)
Primary Sources
- CISA Known Exploited Vulnerabilities Catalog — the official listing that confirms active exploitation, and the source of the KEV date on this page.
- NVD — CVE-2026-16812 — publication date, CVSS score and the full technical record.
- Vendor advisory — arista.com — Arista’s own disclosure, with the affected versions and the fix.
How We Track This
This page is generated from our CISA KEV Lag Tracker, which syncs the official CISA KEV catalog daily and records the date each CVE is added. For every entry we retrieve the original NVD publication date and compute the lag in calendar days. No date or figure on this page is estimated or taken from a third-party source — they come directly from CISA and NVD records. Free to cite with attribution to CVEDaily (CC BY 4.0).