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CVE-2026-20220
medium
CVSS 6.3
Vulnerability in Cisco crosswork-network-controller (CVE-2026-20220)
Summary
vulnerability in Cisco crosswork-network-controller (CVE-2026-20220). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-20220** has been found in Cisco crosswork-network-controller.
Risk of unauthorized operations or information disclosure. CVSS score: 6.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Cisco crosswork-network-controller CVE-2026-20220" on the vendor's site.
CVE-2026-20220 (Cisco crosswork-network-controller) — CWE-74 / CVSS v3 6.3
Attack vector: remote (network-reachable) / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-74) exists in Cisco crosswork-network-controller.
📍 Affected scope
Cisco crosswork-network-controller — .
🔥 Severity
Severity: Medium (CVSS 6.3/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'crosswork-network-controller' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'crosswork-network-controller' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `crosswork-network-controller` を grep し、稼働しているサービス・バージョンを把握する。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
References
- CISCO https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cnc-inj-QNMeEmxk?vs_f=Cisco%20Security%20Advisory%26vs_cat=Security%20Intelligence%26vs_type=RSS%26vs_p=Cisco%20Crosswork%20Network%20Controller%20Server-Side%20Template%20Injection%20Vulnerability%26vs_k=1
- patch [email protected]
- web https://nvd.nist.gov/vuln/detail/CVE-2026-20220
- web https://github.com/advisories/GHSA-x9r3-4p88-q7rc