CVE-2021-1620 is a denial-of-service vulnerability affecting Cisco IOS and IOS XE Software's IKEv2 AutoReconnect feature. It allows an authenticated, remote attacker to exhaust the local IP address pool by failing to release allocated addresses under specific conditions, preventing legitimate users from connecting. Rated High (CVSS 7.7), this vulnerability requires authenticated access but has low attack complexity, leading to a complete loss of availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
15.6\(2\)t2CPE matchmatch criteria | cpe:2.3:o:cisco:ios:15.6\(2\)t2:*:*:*:*:*:*:* | ||
15.6\(2\)t3CPE matchmatch criteria | cpe:2.3:o:cisco:ios:15.6\(2\)t3:*:*:*:*:*:*:* | ||
15.6\(3\)mCPE matchmatch criteria | cpe:2.3:o:cisco:ios:15.6\(3\)m:*:*:*:*:*:*:* | ||
15.6\(3\)m0aCPE matchmatch criteria | cpe:2.3:o:cisco:ios:15.6\(3\)m0a:*:*:*:*:*:*:* | ||
15.6\(3\)m1CPE matchmatch criteria | cpe:2.3:o:cisco:ios:15.6\(3\)m1:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.