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.
CVE-2025-64715
This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.5
- EG Score
- 5.5(medium)
- EG Risk
- 25(Track)EG Risk 25/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity55% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 7%
- KEV
- Not listed
Published
November 29, 2025
Last Modified
June 17, 2026
References (5)
- security-advisories@githubhttps://github.com/cilium/cilium/commit/a385856b59c8289cc7273fa3a3062bbf0ef96c97
- security-advisories@githubhttps://github.com/cilium/cilium/releases/tag/v1.16.17
- security-advisories@githubhttps://github.com/cilium/cilium/releases/tag/v1.17.10
- security-advisories@githubhttps://github.com/cilium/cilium/releases/tag/v1.18.4
- security-advisories@githubhttps://github.com/cilium/cilium/security/advisories/GHSA-38pp-6gcp-rqvm
Vendor Advisories for CVE-2025-64715(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(2 across 1 ecosystem)
Go(2)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| Ciliumgithub.com/cilium/cilium | — | 1.17.10 | — |
| github.com/cilium/cilium | — | 1.18.4 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 44× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-30 01:30 UTCEPSS rescore
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- 2026-07-23 14:11 UTCOSV refresh
- 2026-07-23 03:01 UTCEG score recompute▲ 1.50
- 2026-07-22 14:08 UTCEPSS rescore
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- 2026-07-13 22:29 UTCEPSS rescore
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- 2026-07-06 09:11 UTCOSV refresh
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- 2026-06-24 14:04 UTCEPSS rescore
- 2026-06-24 10:00 UTCNVD updateCVSS v3 → 5.5
- 2026-06-22 14:25 UTCEPSS rescore
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- 2026-06-17 21:05 UTCOSV refresh
- 2026-06-17 17:52 UTCEPSS rescore
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- 2026-06-15 17:48 UTCEPSS rescore
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- 2026-05-31 00:16 UTCEPSS rescore
- 2026-05-31 00:16 UTCEPSS rescore
- 2026-05-29 18:45 UTCEG score recompute
- 2026-05-29 13:44 UTCEPSS rescore
Related CVEs(same CWE)
Same CWE
10 shownCWE-284
Frequently asked(5)
What is CVE-2025-64715?
When was CVE-2025-64715 disclosed?
Is CVE-2025-64715 actively exploited?
What is the CVSS score of CVE-2025-64715?
How do I remediate CVE-2025-64715?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-64715
Is Your Infrastructure Affected by CVE-2025-64715?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.