CVE-2025-64715
Cilium with misconfigured toGroups in policies can lead to unrestricted egress traffic
Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.16.17, 1.17.10, and 1.18.4, CiliumNetworkPolicys which use egress.toGroups.aws.securityGroupsIds to reference AWS security group IDs that do not exist or are not attached to any network interface may unintentionally allow broader outbound access than intended by the policy authors. In such cases, the toCIDRset section of the derived policy is not generated, which means outbound traffic may be permitted to more destinations than originally intended. This issue has been patched in versions 1.16.17, 1.17.10, and 1.18.4. There are no workarounds for this issue.
How to fix CVE-2025-64715
To remediate CVE-2025-64715, upgrade the affected package to a fixed version below.
- —upgrade to 1.16.17 or later
- —upgrade to 1.16.17 or later
- —upgrade to 1.16.17 or later
- —upgrade to 1.17.10 or later
- —upgrade to 1.18.4 or later
- —upgrade to 1.16.17 or later
Is CVE-2025-64715 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 1.16.17, >= 1.17.0, < 1.17.10, >= 1.18.0, < 1.18.4
- from 0, < 1.16.17, >= 1.17.0, < 1.17.10, >= 1.18.0, < 1.18.4
- from 0, < 1.16.17, >= 1.17.0, < 1.17.10, >= 1.18.0, < 1.18.4
- >= 1.17.0, < 1.17.10
- >= 1.18.0, < 1.18.4
- from 0, < 1.16.17, >= 1.17.0, < 1.17.10, >= 1.18.0, < 1.18.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.0 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |