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TI-2020-02926 Aliases CVE-2020-3375GHSA-76f8-hj3g-qcfw

Cisco SD-WAN Solution Software Buffer Overflow Vulnerability

Priority MEDIUM 55CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
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-119 and the CVSS impact.

Summary

A vulnerability in Cisco SD-WAN Solution Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to information that they are not authorized to access, make changes to the system that they are not authorized to make, and execute commands on an affected system with privileges of the root user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03902 90th percentileScored 2026-11-08
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 SD-WAN vManageall versions—No fix listedCNA
  • Cisco SD-WAN vManage VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:cisco:sd-wan:*:*:*:*:*:*:*:*up to 18.3.0; 18.4.0 to before 18.4.5; 19.2.0 to before 19.2.2; 19.3.0 to before 20.1.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:*:*:*:*:*:*:*:*up to 16.9.0; 16.12.0 – 16.12.4; 17.2.0 – 17.2.1VulnerableCisco
  • cpe:2.3:a:cisco:sd-wan:*:*:*:*:*:*:*:* Versions up to 18.3.0; 18.4.0 to before 18.4.5; 19.2.0 to before 19.2.2; 19.3.0 to before 20.1.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:*:*:*:*:*:*:*:* Versions up to 16.9.0; 16.12.0 – 16.12.4; 17.2.0 – 17.2.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3375
  2. 2026-10-03 Alias added: GHSA-76f8-hj3g-qcfw
  3. 2026-10-09 EPSS moved to the 90th–95th percentile

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-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
  • TI-2021-01341 Cisco IOS XE Software NETCONF and RESTCONF Authentication Bypass Vulnerability 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