7.7
CVE-2021-1620
- EPSS 0.33%
- Published 23.09.2021 03:15:13
- Last modified 11.09.2025 14:41:08
- Source psirt@cisco.com
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A vulnerability in the Internet Key Exchange Version 2 (IKEv2) support for the AutoReconnect feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to exhaust the free IP addresses from the assigned local pool. This vulnerability occurs because the code does not release the allocated IP address under certain failure conditions. An attacker could exploit this vulnerability by trying to connect to the device with a non-AnyConnect client. A successful exploit could allow the attacker to exhaust the IP addresses from the assigned local pool, which prevents users from logging in and leads to a denial of service (DoS) condition.
Data is provided by the National Vulnerability Database (NVD)
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
| Type | Source | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.33% | 0.555 |
| Source | Base Score | Exploit Score | Impact Score | Vector string |
|---|---|---|---|---|
| nvd@nist.gov | 7.7 | 3.1 | 4 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
|
| nvd@nist.gov | 3.5 | 6.8 | 2.9 |
AV:N/AC:M/Au:S/C:N/I:N/A:P
|
| psirt@cisco.com | 7.7 | 3.1 | 4 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
|
CWE-563 Assignment to Variable without Use
The variable's value is assigned but never used, making it a dead store.
CWE-772 Missing Release of Resource after Effective Lifetime
The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.