What is CVE-2021-1620?

CVE-2021-1620 is a high-severity vulnerability in Cisco Ios, classified under CWE-563. CVSS score: 7.7/10. Published 2021-09-23.

How severe is CVE-2021-1620?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Cisco Ios

CVE-2021-1620

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 as…

EPSS: 0.011 (61.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Ios — versions n/a
Cisco Ios — versions 12.2\(6\)i1, 15.1\(3\)svr1, 15.1\(3\)svr2
Cisco Ios_xe — versions 3.8.0e, 3.8.1e, 3.8.2e

Weakness classification (CWE)

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-1620?: CVE-2021-1620 is a high-severity vulnerability in Cisco Ios, classified under CWE-563. CVSS score: 7.7/10. Published 2021-09-23.
How severe is CVE-2021-1620?: High severity. CVSS v3 base score is 7.7 out of 10.