CVE-2021-34770
In your normal cycle
Critical by CVSS (10), but no sign of active exploitation.
Description
A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs during the validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with administrative privileges or cause the affected device to crash and reload, resulting in a DoS condition.
Scoring
| CVSS | 10.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 2.96% — more likely to be exploited than 87% of all CVEs |
| Weakness | CWE-122 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-09-23 |
| Last modified | 2026-06-17 |
Affected (11)
| Vendor | Product |
|---|---|
| cisco | catalyst 9800 |
| cisco | catalyst 9800 embedded wireless controller |
| cisco | catalyst 9800-40 |
| cisco | catalyst 9800-40 wireless controller |
| cisco | catalyst 9800-80 |
| cisco | catalyst 9800-80 wireless controller |
| cisco | catalyst 9800-cl |
| cisco | catalyst 9800-l |
| cisco | catalyst 9800-l-c |
| cisco | catalyst 9800-l-f |
| cisco | ios xe |
References
→ the Explorer · watch your stack · NVD