CVE-2025-62820

MEDIUM

4.9

CVSS Score

Published: October 23, 2025 at 12:00 AM UTC

Updated: October 8, 2026 at 11:10 AM UTC

1 product affected across 1 vendorNebula

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Severity

MEDIUM4.9

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

85%

0 ≤ v < 1.9.70

Affected range stops below 1.9.7, so it looks safe — our inference, not a vendor statement

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

Source: cverecord

Source: cverecord

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

4.9MEDIUMmitre

Vector?

StatusDEFERRED

CWE

CWE-420

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