CVE-2024-20433

A vulnerability in the Resource Reservation Protocol (RSVP) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to a buffer overflow when processing crafted RSVP packets. An attacker could exploit this vulnerability by sending RSVP traffic to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Published: 2024-09-25 Last update: 2024-10-03 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-20433 is rated Moderate Risk (49.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.64%). 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-2024-20433

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 2026-06-15 1.14% 0.64% -0.50%
2 2026-03-16 1.48% 1.14% -0.34%
3 2026-03-08 — 1.48% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20433

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-2024-20433

Affected software / configurations for CVE-2024-20433

Vendor Product Version Raw CPE
cisco ios 12.0\(24\)s cpe:2.3:o:cisco:ios:12.0\(24\)s:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s1 cpe:2.3:o:cisco:ios:12.0\(24\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s2 cpe:2.3:o:cisco:ios:12.0\(24\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s2a cpe:2.3:o:cisco:ios:12.0\(24\)s2a:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s2b cpe:2.3:o:cisco:ios:12.0\(24\)s2b:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s3 cpe:2.3:o:cisco:ios:12.0\(24\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s4 cpe:2.3:o:cisco:ios:12.0\(24\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s4a cpe:2.3:o:cisco:ios:12.0\(24\)s4a:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s5 cpe:2.3:o:cisco:ios:12.0\(24\)s5:*:*:*:*:*:*:*
cisco ios 12.0\(24\)s6 cpe:2.3:o:cisco:ios:12.0\(24\)s6:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s cpe:2.3:o:cisco:ios:12.0\(25\)s:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s1 cpe:2.3:o:cisco:ios:12.0\(25\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s1a cpe:2.3:o:cisco:ios:12.0\(25\)s1a:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s1b cpe:2.3:o:cisco:ios:12.0\(25\)s1b:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s1c cpe:2.3:o:cisco:ios:12.0\(25\)s1c:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s1d cpe:2.3:o:cisco:ios:12.0\(25\)s1d:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s2 cpe:2.3:o:cisco:ios:12.0\(25\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s3 cpe:2.3:o:cisco:ios:12.0\(25\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(25\)s4 cpe:2.3:o:cisco:ios:12.0\(25\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx cpe:2.3:o:cisco:ios:12.0\(25\)sx:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx1 cpe:2.3:o:cisco:ios:12.0\(25\)sx1:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx2 cpe:2.3:o:cisco:ios:12.0\(25\)sx2:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx3 cpe:2.3:o:cisco:ios:12.0\(25\)sx3:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx4 cpe:2.3:o:cisco:ios:12.0\(25\)sx4:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx5 cpe:2.3:o:cisco:ios:12.0\(25\)sx5:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx6 cpe:2.3:o:cisco:ios:12.0\(25\)sx6:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx6e cpe:2.3:o:cisco:ios:12.0\(25\)sx6e:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx7 cpe:2.3:o:cisco:ios:12.0\(25\)sx7:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx8 cpe:2.3:o:cisco:ios:12.0\(25\)sx8:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx9 cpe:2.3:o:cisco:ios:12.0\(25\)sx9:*:*:*:*:*:*:*
cisco ios 12.0\(25\)sx10 cpe:2.3:o:cisco:ios:12.0\(25\)sx10:*:*:*:*:*:*:*
cisco ios 12.0\(26\)s cpe:2.3:o:cisco:ios:12.0\(26\)s:*:*:*:*:*:*:*
cisco ios 12.0\(26\)s1 cpe:2.3:o:cisco:ios:12.0\(26\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(26\)s2 cpe:2.3:o:cisco:ios:12.0\(26\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(26\)s3 cpe:2.3:o:cisco:ios:12.0\(26\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(26\)s4 cpe:2.3:o:cisco:ios:12.0\(26\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(26\)s5 cpe:2.3:o:cisco:ios:12.0\(26\)s5:*:*:*:*:*:*:*
cisco ios 12.0\(26\)s6 cpe:2.3:o:cisco:ios:12.0\(26\)s6:*:*:*:*:*:*:*
cisco ios 12.0\(27\)s cpe:2.3:o:cisco:ios:12.0\(27\)s:*:*:*:*:*:*:*
cisco ios 12.0\(27\)s1 cpe:2.3:o:cisco:ios:12.0\(27\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(27\)s2 cpe:2.3:o:cisco:ios:12.0\(27\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(27\)s3 cpe:2.3:o:cisco:ios:12.0\(27\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(27\)s4 cpe:2.3:o:cisco:ios:12.0\(27\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(27\)s5 cpe:2.3:o:cisco:ios:12.0\(27\)s5:*:*:*:*:*:*:*
cisco ios 12.0\(28\)s cpe:2.3:o:cisco:ios:12.0\(28\)s:*:*:*:*:*:*:*
cisco ios 12.0\(28\)s1 cpe:2.3:o:cisco:ios:12.0\(28\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(28\)s2 cpe:2.3:o:cisco:ios:12.0\(28\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(28\)s3 cpe:2.3:o:cisco:ios:12.0\(28\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(28\)s4 cpe:2.3:o:cisco:ios:12.0\(28\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(28\)s5 cpe:2.3:o:cisco:ios:12.0\(28\)s5:*:*:*:*:*:*:*
cisco ios 12.0\(28\)s6 cpe:2.3:o:cisco:ios:12.0\(28\)s6:*:*:*:*:*:*:*
cisco ios 12.0\(29\)s cpe:2.3:o:cisco:ios:12.0\(29\)s:*:*:*:*:*:*:*
cisco ios 12.0\(29\)s1 cpe:2.3:o:cisco:ios:12.0\(29\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(30\)s cpe:2.3:o:cisco:ios:12.0\(30\)s:*:*:*:*:*:*:*
cisco ios 12.0\(30\)s1 cpe:2.3:o:cisco:ios:12.0\(30\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(30\)s2 cpe:2.3:o:cisco:ios:12.0\(30\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(30\)s3 cpe:2.3:o:cisco:ios:12.0\(30\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(30\)s4 cpe:2.3:o:cisco:ios:12.0\(30\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(30\)s5 cpe:2.3:o:cisco:ios:12.0\(30\)s5:*:*:*:*:*:*:*
cisco ios 12.0\(30\)sz4 cpe:2.3:o:cisco:ios:12.0\(30\)sz4:*:*:*:*:*:*:*
cisco ios 12.0\(30\)sz5 cpe:2.3:o:cisco:ios:12.0\(30\)sz5:*:*:*:*:*:*:*
cisco ios 12.0\(30\)sz6 cpe:2.3:o:cisco:ios:12.0\(30\)sz6:*:*:*:*:*:*:*
cisco ios 12.0\(30\)sz8 cpe:2.3:o:cisco:ios:12.0\(30\)sz8:*:*:*:*:*:*:*
cisco ios 12.0\(30\)sz9 cpe:2.3:o:cisco:ios:12.0\(30\)sz9:*:*:*:*:*:*:*
cisco ios 12.0\(30\)sz10 cpe:2.3:o:cisco:ios:12.0\(30\)sz10:*:*:*:*:*:*:*
cisco ios 12.0\(31\)s cpe:2.3:o:cisco:ios:12.0\(31\)s:*:*:*:*:*:*:*
cisco ios 12.0\(31\)s1 cpe:2.3:o:cisco:ios:12.0\(31\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(31\)s2 cpe:2.3:o:cisco:ios:12.0\(31\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(31\)s3 cpe:2.3:o:cisco:ios:12.0\(31\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(31\)s4 cpe:2.3:o:cisco:ios:12.0\(31\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(31\)s5 cpe:2.3:o:cisco:ios:12.0\(31\)s5:*:*:*:*:*:*:*
cisco ios 12.0\(31\)s6 cpe:2.3:o:cisco:ios:12.0\(31\)s6:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s cpe:2.3:o:cisco:ios:12.0\(32\)s:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s1 cpe:2.3:o:cisco:ios:12.0\(32\)s1:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s2 cpe:2.3:o:cisco:ios:12.0\(32\)s2:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s3 cpe:2.3:o:cisco:ios:12.0\(32\)s3:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s4 cpe:2.3:o:cisco:ios:12.0\(32\)s4:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s5 cpe:2.3:o:cisco:ios:12.0\(32\)s5:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s6 cpe:2.3:o:cisco:ios:12.0\(32\)s6:*:*:*:*:*:*:*
cisco ios 12.0\(32\)s7 cpe:2.3:o:cisco:ios:12.0\(32\)s7:*:*:*:*:*:*:*

References for CVE-2024-20433

cvelogic Threat Intelligence