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CVE-2015-4291

20
FAUCET Score

CVE-2015-4291 describes a denial-of-service vulnerability in Cisco IOS XE versions 2.x and 2.5.x on ASR 1000 devices. Remote attackers can trigger an Embedded Services Processor crash by sending a crafted series of fragmented IPv4 or IPv6 packets. With a CVSS score of 7.8 (High), this vulnerability is easily exploitable over the network without authentication, leading to a complete loss of availability. While no public exploit code or active exploitation is noted, the vulnerability has received some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2.1.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.1.0:*:*:*:*:*:*:*
2.1.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.1.1:*:*:*:*:*:*:*
2.1.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.1.2:*:*:*:*:*:*:*
2.2.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.2.1:*:*:*:*:*:*:*
2.2.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.2.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.98%
Probability of exploitation in next 30 days
EPSS Percentile
78.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0198 is in the 62nd percentile among its peer group of 51,553 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, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

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-20150730-asr1k
Vendor Advisory
securitytracker.com / id/1033131