CVE-2024-20311

A vulnerability in the Locator ID Separation Protocol (LISP) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. This vulnerability is due to the incorrect handling of LISP packets. An attacker could exploit this vulnerability by sending a crafted LISP packet to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. Note: This vulnerability could be exploited over either IPv4 or IPv6 transport.

Published: 2024-03-27 Last update: 2025-07-30 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-20311 is rated Moderate Risk (60.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.82%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-20311

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-16 1.06% 0.82% -0.25%
2 2025-12-28 1.17% 1.06% -0.10%
3 2025-12-27 — 1.17% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20311

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.6 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 4.0 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-20311

Affected software / configurations for CVE-2024-20311

Vendor Product Version Raw CPE
cisco ios 15.1\(1\)sy cpe:2.3:o:cisco:ios:15.1\(1\)sy:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy1 cpe:2.3:o:cisco:ios:15.1\(1\)sy1:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy2 cpe:2.3:o:cisco:ios:15.1\(1\)sy2:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy3 cpe:2.3:o:cisco:ios:15.1\(1\)sy3:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy4 cpe:2.3:o:cisco:ios:15.1\(1\)sy4:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy5 cpe:2.3:o:cisco:ios:15.1\(1\)sy5:*:*:*:*:*:*:*
cisco ios 15.1\(1\)sy6 cpe:2.3:o:cisco:ios:15.1\(1\)sy6:*:*:*:*:*:*:*
cisco ios 15.1\(1\)xb cpe:2.3:o:cisco:ios:15.1\(1\)xb:*:*:*:*:*:*:*
cisco ios 15.1\(2\)s cpe:2.3:o:cisco:ios:15.1\(2\)s:*:*:*:*:*:*:*
cisco ios 15.1\(2\)s1 cpe:2.3:o:cisco:ios:15.1\(2\)s1:*:*:*:*:*:*:*
cisco ios 15.1\(2\)s2 cpe:2.3:o:cisco:ios:15.1\(2\)s2:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy cpe:2.3:o:cisco:ios:15.1\(2\)sy:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy1 cpe:2.3:o:cisco:ios:15.1\(2\)sy1:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy2 cpe:2.3:o:cisco:ios:15.1\(2\)sy2:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy3 cpe:2.3:o:cisco:ios:15.1\(2\)sy3:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy4 cpe:2.3:o:cisco:ios:15.1\(2\)sy4:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy4a cpe:2.3:o:cisco:ios:15.1\(2\)sy4a:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy5 cpe:2.3:o:cisco:ios:15.1\(2\)sy5:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy6 cpe:2.3:o:cisco:ios:15.1\(2\)sy6:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy7 cpe:2.3:o:cisco:ios:15.1\(2\)sy7:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy8 cpe:2.3:o:cisco:ios:15.1\(2\)sy8:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy9 cpe:2.3:o:cisco:ios:15.1\(2\)sy9:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy10 cpe:2.3:o:cisco:ios:15.1\(2\)sy10:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy11 cpe:2.3:o:cisco:ios:15.1\(2\)sy11:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy12 cpe:2.3:o:cisco:ios:15.1\(2\)sy12:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy13 cpe:2.3:o:cisco:ios:15.1\(2\)sy13:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy14 cpe:2.3:o:cisco:ios:15.1\(2\)sy14:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy15 cpe:2.3:o:cisco:ios:15.1\(2\)sy15:*:*:*:*:*:*:*
cisco ios 15.1\(2\)sy16 cpe:2.3:o:cisco:ios:15.1\(2\)sy16:*:*:*:*:*:*:*
cisco ios 15.1\(3\)mra cpe:2.3:o:cisco:ios:15.1\(3\)mra:*:*:*:*:*:*:*
cisco ios 15.1\(3\)mra1 cpe:2.3:o:cisco:ios:15.1\(3\)mra1:*:*:*:*:*:*:*
cisco ios 15.1\(3\)mra2 cpe:2.3:o:cisco:ios:15.1\(3\)mra2:*:*:*:*:*:*:*
cisco ios 15.1\(3\)mra3 cpe:2.3:o:cisco:ios:15.1\(3\)mra3:*:*:*:*:*:*:*
cisco ios 15.1\(3\)mra4 cpe:2.3:o:cisco:ios:15.1\(3\)mra4:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s cpe:2.3:o:cisco:ios:15.1\(3\)s:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s0a cpe:2.3:o:cisco:ios:15.1\(3\)s0a:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s1 cpe:2.3:o:cisco:ios:15.1\(3\)s1:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s2 cpe:2.3:o:cisco:ios:15.1\(3\)s2:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s3 cpe:2.3:o:cisco:ios:15.1\(3\)s3:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s4 cpe:2.3:o:cisco:ios:15.1\(3\)s4:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s5 cpe:2.3:o:cisco:ios:15.1\(3\)s5:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s5a cpe:2.3:o:cisco:ios:15.1\(3\)s5a:*:*:*:*:*:*:*
cisco ios 15.1\(3\)s6 cpe:2.3:o:cisco:ios:15.1\(3\)s6:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svb1 cpe:2.3:o:cisco:ios:15.1\(3\)svb1:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svb2 cpe:2.3:o:cisco:ios:15.1\(3\)svb2:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svd cpe:2.3:o:cisco:ios:15.1\(3\)svd:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svd1 cpe:2.3:o:cisco:ios:15.1\(3\)svd1:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svd2 cpe:2.3:o:cisco:ios:15.1\(3\)svd2:*:*:*:*:*:*:*
cisco ios 15.1\(3\)sve cpe:2.3:o:cisco:ios:15.1\(3\)sve:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svf cpe:2.3:o:cisco:ios:15.1\(3\)svf:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svf1 cpe:2.3:o:cisco:ios:15.1\(3\)svf1:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svg cpe:2.3:o:cisco:ios:15.1\(3\)svg:*:*:*:*:*:*:*
cisco ios 15.1\(3\)svj2 cpe:2.3:o:cisco:ios:15.1\(3\)svj2:*:*:*:*:*:*:*
cisco ios 15.1\(4\)gc cpe:2.3:o:cisco:ios:15.1\(4\)gc:*:*:*:*:*:*:*
cisco ios 15.1\(4\)gc1 cpe:2.3:o:cisco:ios:15.1\(4\)gc1:*:*:*:*:*:*:*
cisco ios 15.1\(4\)gc2 cpe:2.3:o:cisco:ios:15.1\(4\)gc2:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m cpe:2.3:o:cisco:ios:15.1\(4\)m:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m1 cpe:2.3:o:cisco:ios:15.1\(4\)m1:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m2 cpe:2.3:o:cisco:ios:15.1\(4\)m2:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m3 cpe:2.3:o:cisco:ios:15.1\(4\)m3:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m3a cpe:2.3:o:cisco:ios:15.1\(4\)m3a:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m4 cpe:2.3:o:cisco:ios:15.1\(4\)m4:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m5 cpe:2.3:o:cisco:ios:15.1\(4\)m5:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m6 cpe:2.3:o:cisco:ios:15.1\(4\)m6:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m7 cpe:2.3:o:cisco:ios:15.1\(4\)m7:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m8 cpe:2.3:o:cisco:ios:15.1\(4\)m8:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m9 cpe:2.3:o:cisco:ios:15.1\(4\)m9:*:*:*:*:*:*:*
cisco ios 15.1\(4\)m10 cpe:2.3:o:cisco:ios:15.1\(4\)m10:*:*:*:*:*:*:*
cisco ios 15.2\(1\)gc cpe:2.3:o:cisco:ios:15.2\(1\)gc:*:*:*:*:*:*:*
cisco ios 15.2\(1\)gc1 cpe:2.3:o:cisco:ios:15.2\(1\)gc1:*:*:*:*:*:*:*
cisco ios 15.2\(1\)gc2 cpe:2.3:o:cisco:ios:15.2\(1\)gc2:*:*:*:*:*:*:*
cisco ios 15.2\(1\)s cpe:2.3:o:cisco:ios:15.2\(1\)s:*:*:*:*:*:*:*
cisco ios 15.2\(1\)s1 cpe:2.3:o:cisco:ios:15.2\(1\)s1:*:*:*:*:*:*:*
cisco ios 15.2\(1\)s2 cpe:2.3:o:cisco:ios:15.2\(1\)s2:*:*:*:*:*:*:*
cisco ios 15.2\(1\)sy cpe:2.3:o:cisco:ios:15.2\(1\)sy:*:*:*:*:*:*:*
cisco ios 15.2\(1\)sy0a cpe:2.3:o:cisco:ios:15.2\(1\)sy0a:*:*:*:*:*:*:*
cisco ios 15.2\(1\)sy1 cpe:2.3:o:cisco:ios:15.2\(1\)sy1:*:*:*:*:*:*:*
cisco ios 15.2\(1\)sy1a cpe:2.3:o:cisco:ios:15.2\(1\)sy1a:*:*:*:*:*:*:*
cisco ios 15.2\(1\)sy2 cpe:2.3:o:cisco:ios:15.2\(1\)sy2:*:*:*:*:*:*:*
cisco ios 15.2\(1\)sy3 cpe:2.3:o:cisco:ios:15.2\(1\)sy3:*:*:*:*:*:*:*

References for CVE-2024-20311

cvelogic Threat Intelligence