Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
Priority LOW 37CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · 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 vEdge Software could allow an attacker to execute arbitrary code as the root user or cause a denial of service (DoS) condition on 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 0.01216 68th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco SD-WAN vEdge router | all versions | — | No fix listed | CNA |
- Cisco SD-WAN vEdge router VendorCisco Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 24
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:vedge_100_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:vedge_100_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_100:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:vedge_1000_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:vedge_1000_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_1000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:vedge_100b_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:vedge_100b_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_100b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:vedge_100m_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:vedge_100_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:vedge_100_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_100:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:vedge_1000_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:vedge_1000_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_1000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:vedge_100b_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:vedge_100b_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_100b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:vedge_100m_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
Show 14 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:vedge_100m_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_100m:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:vedge_100wm_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:vedge_100wm_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_100wm:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:vedge_2000_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:vedge_2000_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_2000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:vedge_5000_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:vedge_5000_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_5000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:vedge_cloud_firmware:*:*:*:*:*:*:*:* | 20.4 to before 20.4.1; 20.5 to before 20.5.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:vedge_cloud_firmware:19.2.99:*:*:*:*:*:*:* | 19.2.99 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:vedge_cloud:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:vedge_100m_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_100m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:vedge_100wm_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:vedge_100wm_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_100wm:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:vedge_2000_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:vedge_2000_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_2000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:vedge_5000_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:vedge_5000_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_5000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:vedge_cloud_firmware:*:*:*:*:*:*:*:* Versions 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:vedge_cloud_firmware:19.2.99:*:*:*:*:*:*:* Versions 19.2.99 Vulnerable ·Cisco
- cpe:2.3:h:cisco:vedge_cloud:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·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 vEdge router — 20210505 Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2021-01238 Cisco SD-WAN vEdge Software Buffer Overflow VulnerabilitiesPriority LOW 37
- TI-2021-01237 Cisco SD-WAN vEdge Software Buffer Overflow VulnerabilitiesPriority LOW 37
Timeline
- 2026-10-02 Threatist record created from CVE-2021-1509
- 2026-10-03 Alias added: GHSA-x977-vgq2-xc7r
References
More Cisco Vedge 1000 Firmware vulnerabilities
- TI-2019-01276 Cisco SD-WAN Solution Arbitrary File Overwrite Vulnerability CVSS 3.1HIGH 8.8
- TI-2018-00391 Cisco SD-WAN Solution Privilege Escalation Vulnerability CVSS 3.0HIGH 8.8
- TI-2021-01240 Cisco SD-WAN Software vDaemon Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2021-01238 Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities CVSS 3.1HIGH 7.5
- TI-2021-01237 Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities CVSS 3.1HIGH 7.5
- TI-2021-01255 Cisco SD-WAN Software Privilege Escalation Vulnerability CVSS 3.1HIGH 7.8
Sources
- CVE-2021-1509 · CVE Program
- CVE-2021-1509 · NVD
- FIRST EPSS
- GHSA-x977-vgq2-xc7r · 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