CVE-2013-7309

The OSPF implementation in Extreme Networks EXOS does not consider the possibility of duplicate Link State ID values in Link State Advertisement (LSA) packets before performing operations on the LSA database, which allows remote attackers to cause a denial of service (routing disruption) or obtain sensitive packet information via a crafted LSA packet, a related issue to CVE-2013-0149.

Published: 2014-01-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]

NVD Status：Modified，CVE State: published

View at NVD, CVE.org, EUVD

Conclusion & alert: CVE-2013-7309 is rated Moderate Risk (44.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.23%). Mandatory action: 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-2013-7309

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	2026-07-06	1.12%	1.23%	+0.11%
2	2026-06-15	0.40%	1.12%	+0.72%
3	2025-11-08	—	0.40%	—

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-7309

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.4	2.0	MEDIUM	`AV:A/AC:M/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:A) Requires access to an adjacent network segment. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	5.5	6.4	[email protected]

Weakness enumeration for CVE-2013-7309

NVD evaluator notes for CVE-2013-7309

Comment: Per: http://cwe.mitre.org/data/definitions/694.html "CWE-694: Use of Multiple Resources with Duplicate Identifier"

Affected software / configurations for CVE-2013-7309

Vendor	Product	Version	Raw CPE
extremenetworks	exos	—	cpe:2.3:o:extremenetworks:exos:-:::::::*

References for CVE-2013-7309

URL	Tags
http://www.kb.cert.org/vuls/id/229804	US Government Resource
http://www.kb.cert.org/vuls/id/BLUU-985QSE	US Government Resource

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