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CVE-2013-5549

23
FAUCET Score

CVE-2013-5549 describes a denial-of-service vulnerability in Cisco IOS XR versions 3.8.1 through 4.2.0, affecting specific route-processor components. Remote attackers can exploit this by sending specially crafted fragmented IPv4 or IPv6 packets, leading to a transmission outage. The vulnerability has a CVSS score of 7.1, indicating high severity due to its remote attack vector, medium complexity, and complete impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.8.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:3.8.1:*:*:*:*:*:*:*
3.8.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:3.8.2:*:*:*:*:*:*:*
3.8.3CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:3.8.3:*:*:*:*:*:*:*
3.8.4CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:3.8.4:*:*:*:*:*:*:*
3.9.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:3.9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.1HIGH

AV:N/AC:M/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.66%
Probability of exploitation in next 30 days
EPSS Percentile
74.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0166 is in the 31st percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20131023-iosxr
Vendor Advisory