How severe is CVE-2021-1299?

CVE-2021-1299 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-1299 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-1299?

CVE-2021-1299 primarily affects Cisco Sd-wan Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-1299?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-1299 published?

CVE-2021-1299 was published on 2021-01-20 and last updated on 2026-06-17.

CVE-2021-1299

CVE-2021-1299 is a high-severity vulnerability in Cisco Sd-wan Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Cisco Sd-wan Firmware
Published: 2021-01-20
Last modified: 2026-06-17

Description

Multiple vulnerabilities in Cisco SD-WAN products could allow an authenticated attacker to perform command injection attacks against an affected device, which could allow the attacker to take certain actions with root privileges on the device. For more information about these vulnerabilities, see the Details section of this advisory.

Frequently asked questions

What is CVE-2021-1299?: Multiple vulnerabilities in Cisco SD-WAN products could allow an authenticated attacker to perform command injection attacks against an affected device, which could allow the attacker to take certain actions with root privileges on the device. For more information about these vulnerabilities, see the Details section of this advisory.
How severe is CVE-2021-1299?: CVE-2021-1299 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-1299 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-1299?: CVE-2021-1299 primarily affects Cisco Sd-wan Firmware. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-1299?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-1299 published?: CVE-2021-1299 was published on 2021-01-20 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-cmdinjm-9QMSmgcn

Affected products (10)

cpe:2.3:o:cisco:sd-wan_firmware:18.2.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:18.3.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:18.3.8:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:18.4.6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:19.2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:19.2.99:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_firmware:20.1.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:sd-wan_vsmart_controller_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:catalyst_sd-wan_manager:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:-:*:*:*:*:*:*:*

More vulnerabilities in Cisco Sd-wan Firmware

CVE-2021-1301 — Critical (CVSS 9.8): Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute attacks…
CVE-2021-1300 — Critical (CVSS 9.8): Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute attacks…
CVE-2021-1305 — High (CVSS 8.8): Multiple vulnerabilities in the web-based management interface of Cisco SD-WAN vManage Software could allow an…
CVE-2021-1298 — High (CVSS 8.8): Multiple vulnerabilities in Cisco SD-WAN products could allow an authenticated attacker to perform command injection…
CVE-2020-3387 — High (CVSS 8.8): A vulnerability in Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to execute code with…
CVE-2020-3381 — High (CVSS 8.8): A vulnerability in the web management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote…

All CVEs affecting Cisco Sd-wan Firmware →

Other CWE-77 (Command Injection) vulnerabilities

CVE-2026-23652 — Critical (CVSS 10.0): Improper neutralization of special elements used in a command ('command injection') in Microsoft Power Pages allows an…
CVE-2025-59818 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute arbitrary commands on the underlying system using the file…
CVE-2025-64093 — Critical (CVSS 10.0): Remote Code Execution vulnerability that allows unauthenticated attackers to inject arbitrary commands into the…
CVE-2025-64090 — Critical (CVSS 10.0): This vulnerability allows authenticated attackers to execute commands via the hostname of the device.
CVE-2025-61492 — Critical (CVSS 10.0): A command injection vulnerability in the execute_command function of terminal-controller-mcp 0.1.7 allows attackers to…
CVE-2025-10035 — Critical (CVSS 10.0): A deserialization vulnerability in the License Servlet of Fortra's GoAnywhere MFT allows an actor with a validly forged…

Browse all CWE-77 (Command Injection) vulnerabilities →