{"answers":{"affected":"It affects 3 products.","exploited":"Yes. Attackers have exploited CVE-2026-20127 in the wild since at least 25 Feb 2026.","fix":"No fix has been published for CVE-2026-20127 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 27 Feb 2026.","what":"CVE-2026-20127 is a critical authentication bypass vulnerability in Cisco Catalyst Sd-Wan Manager, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-20127 and fix it if it is affected.\n\nWhat it is: CVE-2026-20127 is a critical authentication bypass vulnerability in Cisco Catalyst Sd-Wan Manager, published on 25 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2026-20127 in the wild since at least 25 Feb 2026.\n\nAffected product: Cisco Catalyst Sd-Wan Manager. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-20127/ (Markdown: https://insights.sbomify.com/CVE-2026-20127/index.md)","id":"CVE-2026-20127","markdown":"https://insights.sbomify.com/CVE-2026-20127/index.md","name":"CVE-2026-20127","record":{"aliases":["GHSA-p4cq-46q3-jr7w"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["privilege_escalation","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco Catalyst SD-WAN","requires_auth":"none","summary":"Unauthenticated remote attackers can bypass peering authentication to gain administrative privileges and manipulate SD-WAN network configurations.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"catalyst_sd-wan_manager","vendor":"cisco"},{"product":"sd-wan_vbond_orchestrator","vendor":"cisco"},{"product":"sd-wan_vsmart_controller","vendor":"cisco"}],"cvss":{"score":10,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.\r\n\r\nThis vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root\u0026nbsp;user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.\u0026nbsp;","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-02-25","github_poc":9,"max_poc_stars":30,"metasploit":1,"nuclei":0,"refs":[{"date":"2026-03-04T01:20:17Z","kind":"github_poc","ref":"https://github.com/zerozenxlabs/CVE-2026-20127---Cisco-SD-WAN-Preauth-RCE","stars":30,"title":null},{"date":"2026-03-09T14:38:24Z","kind":"github_poc","ref":"https://github.com/sfewer-r7/CVE-2026-20127","stars":24,"title":"An exploit for the Cisco Catalyst SD-WAN Controller authentication bypass vulnerability, CVE-2026-20127"},{"date":"2026-03-05T15:28:31Z","kind":"github_poc","ref":"https://github.com/BugFor-Pings/CVE-2026-20127_EXP","stars":4,"title":"Cisco Catalyst SD-WAN 身份验证绕过漏洞(CVE-2026-20127)利用EXP"},{"date":"2026-03-07T09:39:29Z","kind":"github_poc","ref":"https://github.com/yonathanpy/CVE-2026-20127-Cisco-SD-WAN-Preauth-RCE","stars":2,"title":null},{"date":"2026-04-15T16:35:46Z","kind":"github_poc","ref":"https://github.com/gigachadusers/cve-2026-20127","stars":2,"title":null},{"date":"2026-02-25","kind":"metasploit","ref":"auxiliary/admin/networking/cisco_sdwan_auth_bypass","stars":null,"title":"Cisco Catalyst SD-WAN Controller Authentication Bypass"},{"date":"2026-03-04T03:25:57Z","kind":"github_poc","ref":"https://github.com/randeepajayasekara/CVE-2026-20127","stars":0,"title":"Walkthrough of the CVSS 10.0 authentication bypass in Cisco Catalyst SD-WAN from first malformed peering request to root on the management plane."},{"date":"2026-03-08T09:04:34Z","kind":"github_poc","ref":"https://github.com/abrahamsurf/sdwan-scanner-CVE-2026-20127","stars":0,"title":"Cisco SD-WAN Exposure \u0026 Potential Vulnerability Scanner (Passive Fingerprinting) 2026"}],"tier":"exploited"},"has_fix":null,"headline":"Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass","id":"CVE-2026-20127","indexable":true,"kev":{"dateAdded":"2026-02-25","dueDate":"2026-02-27","knownRansomwareCampaignUse":"Unknown","product":"Catalyst SD-WAN Controller and Manager","requiredAction":"Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt \u0026 Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.","vendorProject":"Cisco","vulnerabilityName":"Cisco Catalyst SD-WAN Controller and Manager Authentication Bypass Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"cisco:catalyst_sd-wan_manager","products":["cisco:catalyst_sd-wan_manager"],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format","id":"CVE-2026-20128"},"packages":[],"prev":{"headline":"Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability","id":"CVE-2026-20126"},"products":["Cisco Catalyst SD-WAN Manager"],"published":"2026-02-25","related":[{"cvss_score":10,"headline":"Cisco Catalyst SD-WAN Controller Authentication Bypass","id":"CVE-2026-20182","kev_date_added":"2026-05-14","published":"2026-05-14"},{"cvss_score":9.8,"headline":"Cisco Catalyst SD-WAN Manager Hex Encoding","id":"CVE-2026-76504","kev_date_added":"2026-09-30","published":"2026-09-30"},{"cvss_score":7.8,"headline":"Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output","id":"CVE-2026-20245","kev_date_added":"2026-06-09","published":"2026-06-04"},{"cvss_score":7.8,"headline":"Cisco SD-WAN Path Traversal","id":"CVE-2022-20775","kev_date_added":"2026-02-25","published":"2022-09-30"},{"cvss_score":7.5,"headline":"Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format","id":"CVE-2026-20128","kev_date_added":"2026-04-20","published":"2026-02-25"},{"cvss_score":6.5,"headline":"Cisco Catalyst SD-WAN Manager Directory or Path Traversal","id":"CVE-2026-20262","kev_date_added":"2026-06-15","published":"2026-06-15"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-16","vendors":["Cisco"]},"summary":"Unauthenticated remote attackers can bypass peering authentication to gain administrative privileges and manipulate SD-WAN network configurations.","url":"https://insights.sbomify.com/CVE-2026-20127/"}