CVE-2013-6693

The MLDP implementation in Cisco IOS 15.3(3)S and earlier on 7600 routers, when many VRFs are configured, allows remote attackers to cause a denial of service (chunk corruption and device reload) by establishing many multicast flows, aka Bug ID CSCue22345.

Published: 2013-11-21 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-6693 is rated Moderate Risk (44.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.13%). 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-2013-6693

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 0.37% 1.13% +0.76%
2 2025-03-30 0.53% 0.37% -0.16%
3 2025-03-29 — 0.53% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-6693

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.4 2.0 MEDIUM
AV:N/AC:H/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 4.9 6.9 [email protected]

Weakness enumeration for CVE-2013-6693

Affected software / configurations for CVE-2013-6693

Vendor Product Version Raw CPE
cisco ios <= 15.3\(3\)s cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios 15.3\(2\)s cpe:2.3:o:cisco:ios:15.3\(2\)s:*:*:*:*:*:*:*
cisco ios 15.3s cpe:2.3:o:cisco:ios:15.3s:*:*:*:*:*:*:*
cisco 7600_router — cpe:2.3:h:cisco:7600_router:*:*:*:*:*:*:*:*

References for CVE-2013-6693

cvelogic Threat Intelligence