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CVE-2014-3353

19
FAUCET Score

CVE-2014-3353 is a denial-of-service vulnerability affecting Cisco IOS XR 4.3(.2) and earlier, specifically in Cisco Carrier Routing System (CRS) devices. A remote attacker can exploit this by sending a malformed IPv6 packet, leading to high CPU utilization and IPv6 packet drops. With a CVSS score of 7.1, it is considered high severity due to its network-based attack vector and complete availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
4.3.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:4.3.0:*:*:*:*:*:*:*
4.3.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:4.3.1:*:*:*:*:*:*:*

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
2.55%
Probability of exploitation in next 30 days
EPSS Percentile
83.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0255 is in the 41st percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

secunia.com / advisories/60205
exchange.xforce.ibmcloud.com / vulnerabilities/95623
tools.cisco.com / security/center/content/CiscoSecurityNotice/CVE-2014-3353
Vendor Advisory
tools.cisco.com / security/center/viewAlert.x
Vendor Advisory
securityfocus.com / bid/69506
securitytracker.com / id/1030790