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CVE-2014-3321

16
FAUCET Score

CVE-2014-3321 describes a denial-of-service vulnerability in Cisco IOS XR 4.3.4 and earlier on ASR 9000 devices with enabled bridge-group virtual interface (BVI) routing. Remote attackers can exploit this flaw by sending crafted MPLS packets, leading to chip and card hangs on affected devices. The vulnerability has a CVSS score of 5.7, indicating a medium severity, with an adjacent network attack vector and medium attack complexity, resulting in a complete loss of availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3.4CPE 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:*:*:*:*:*:*:*
4.3.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:4.3.2:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:h:cisco:asr_9000_rsp440_router:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.7MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
5.5
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.65%
Probability of exploitation in next 30 days
EPSS Percentile
47.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0065 is in the 93rd percentile among its peer group of 1,749 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.0 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/CiscoSecurityNotice/CVE-2014-3321
Vendor Advisory
tools.cisco.com / security/center/viewAlert.x
Vendor Advisory
securitytracker.com / id/1030597
Third Party AdvisoryVDB Entry