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TI-2020-02776 Aliases CVE-2020-3216GHSA-vx84-h8r2-7438

Cisco IOS XE SD-WAN Software Authentication Bypass Vulnerability

Priority LOW 32CWE-287Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

A vulnerability in Cisco IOS XE SD-WAN Software could allow an unauthenticated, physical attacker to bypass authentication and gain unrestricted access to the root shell of an affected device. The vulnerability exists because the affected software has insufficient authentication mechanisms for certain commands. An attacker could exploit this vulnerability by stopping the boot initialization of an affected device. A successful exploit could allow the attacker to bypass authentication and gain unrestricted access to the root shell of the affected device.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00435 38th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco IOS XE SD-WAN Softwareall versions—No fix listedCNA
  • Cisco IOS XE SD-WAN Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.0:*:*:*:*:*:*:*16.9.0VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.1:*:*:*:*:*:*:*16.9.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.2:*:*:*:*:*:*:*16.9.2VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.3:*:*:*:*:*:*:*16.9.3VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.4:*:*:*:*:*:*:*16.9.4VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.0:*:*:*:*:*:*:*16.10.0VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.1:*:*:*:*:*:*:*16.10.1VulnerableCisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.0:*:*:*:*:*:*:* Versions 16.9.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.1:*:*:*:*:*:*:* Versions 16.9.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.2:*:*:*:*:*:*:* Versions 16.9.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.3:*:*:*:*:*:*:* Versions 16.9.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.4:*:*:*:*:*:*:* Versions 16.9.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.0:*:*:*:*:*:*:* Versions 16.10.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.1:*:*:*:*:*:*:* Versions 16.10.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3216
  2. 2026-10-03 Alias added: GHSA-vx84-h8r2-7438

References

Advisory 1

  • TI-2025-14647 Stack-based buffer overflow in Cisco IOS KEVCVSS 3.1HIGH 7.7
  • TI-2021-01110 Cisco IOS XE SD-WAN Software Parameter Injection Vulnerabilities CVSS 3.1MEDIUM 6.7
  • TI-2020-02926 Cisco SD-WAN Solution Software Buffer Overflow Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2021-13726 Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2021-01028 Cisco SD-WAN Buffer Overflow Vulnerabilities CVSS 3.1CRITICAL 9.8
  • TI-2021-01027 Cisco SD-WAN Buffer Overflow Vulnerabilities CVSS 3.1CRITICAL 9.8
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences