Cisco SD-WAN Denial of Service Vulnerabilities
Priority MEDIUM 47CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against an affected device. For more information about these vulnerabilities, see the Details section of this advisory.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01901 79th 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
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco SD-WAN Solution | all versions | — | No fix listed | CNA |
- Cisco SD-WAN Solution VendorCisco Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 22
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xe_sd-wan:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:18.3.5:*:*:*:*:*:*:* | 18.3.5 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:18.3.8:*:*:*:*:*:*:* | 18.3.8 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:18.4.1:*:*:*:*:*:*:* | 18.4.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:18.4.4:*:*:*:*:*:*:* | 18.4.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:18.4.5:*:*:*:*:*:*:* | 18.4.5 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:19.2.0:*:*:*:*:*:*:* | 19.2.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:19.2.1:*:*:*:*:*:*:* | 19.2.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:19.2.2:*:*:*:*:*:*:* | 19.2.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xe_sd-wan:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:18.3.5:*:*:*:*:*:*:* Versions 18.3.5 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:18.3.8:*:*:*:*:*:*:* Versions 18.3.8 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:18.4.1:*:*:*:*:*:*:* Versions 18.4.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:18.4.4:*:*:*:*:*:*:* Versions 18.4.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:18.4.5:*:*:*:*:*:*:* Versions 18.4.5 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:19.2.0:*:*:*:*:*:*:* Versions 19.2.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:19.2.1:*:*:*:*:*:*:* Versions 19.2.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:19.2.2:*:*:*:*:*:*:* Versions 19.2.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
Show 12 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:sd-wan_firmware:20.1.0:*:*:*:*:*:*:* | 20.1.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:sd-wan_vsmart_controller_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_100_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:vedge_1000_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:vedge_100b_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:vedge_100m_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:vedge_100wm_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:vedge_2000_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:vedge_5000_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:vedge_cloud_router:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:a:cisco:catalyst_sd-wan_manager:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Cisco |
| cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Cisco |
- cpe:2.3:o:cisco:sd-wan_firmware:20.1.0:*:*:*:*:*:*:* Versions 20.1.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:sd-wan_vsmart_controller_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_100_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:vedge_1000_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:vedge_100b_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:vedge_100m_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:vedge_100wm_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:vedge_2000_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:vedge_5000_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:vedge_cloud_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:a:cisco:catalyst_sd-wan_manager:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
- cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Cisco SD-WAN Solution — 20210120 Cisco SD-WAN Denial of Service Vulnerabilities
5 records Highest priority Priority MEDIUM 5 MEDIUM
Other records, highest priority first
- TI-2021-01005 Cisco SD-WAN Denial of Service VulnerabilitiesPriority MEDIUM 47
- TI-2021-01001 Cisco SD-WAN Denial of Service VulnerabilitiesPriority MEDIUM 47
- TI-2021-01006 Cisco SD-WAN Denial of Service VulnerabilitiesPriority MEDIUM 46
Timeline
- 2026-10-02 Threatist record created from CVE-2021-1273
- 2026-10-03 Alias added: GHSA-vp27-rfq3-8m9q
References
More Cisco Catalyst Sd-wan Manager vulnerabilities
- TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2026-16340 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2026-16436 Cisco Catalyst SD-WAN Controller Authenticated Privilege Escalation Vulnerability KEVCVSS 3.1HIGH 7.8
- TI-2022-05334 Cisco SD-WAN Software Privilege Escalation Vulnerability KEVCVSS 3.1HIGH 7.8
- TI-2026-16341 Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability KEVCVSS 3.1HIGH 7.5
Sources
- CVE-2021-1273 · CVE Program
- CVE-2021-1273 · NVD
- FIRST EPSS
- GHSA-vp27-rfq3-8m9q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences