8.2

CVE-2026-86107: arista networks velocloud Out-of-bounds Write

CVSS: 8.2v4.0HighAwaiting analysis
Published 16-09-2026Last modified 16-09-2026
Open JSON

Vulnerability summary

CVE-2026-86107 is a high (CVSS 8.2) Out-of-bounds Write vulnerability in arista networks velocloud. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.2% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.2/10
010
High · v4.0 (CVE.org)
EPSS score
0.37%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-09-2026
    PublishedVulnerability first disclosed.
  2. 16-09-2026
    Last modifiedVulnerability information updated.

Description

The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability when processing tunneled IP fragments between authenticated overlay neighbors. This vulnerability impacts the VeloCloud VCMP tunnel protocol only. A successful exploit can cause the affected process to terminate and restart, leading to a temporary disruption of traffic. Hosts on the internet that are unauthenticated and unable to form an overlay peer relationship can not trigger the vulnerable logic.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

+0.02 pp

From 0.35% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.37%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Arista networks2 products
  • velocloud≥ 1.0.0.0, < 5.2.0.0 | ≥ 5.2.0.0, < 5.2.7.0 | ≥ 6.1.0.0, < 6.1.5.0 | ≥ 6.4.0.0, < 6.4.2.0
  • velocloud gateway≥ 1.0.0.0, < 5.2.0.0 | ≥ 5.2.0.0, < 5.2.7.0 | ≥ 6.1.0.0, < 6.1.5.0 | ≥ 6.4.0.0, < 6.4.2.0

1 vendor · 2 products

References

1 links