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CVE-2015-4293

15
FAUCET Score

CVE-2015-4293 describes a denial-of-service vulnerability in Cisco IOS XE versions 3.13S and earlier, affecting ASR routers. Remote attackers can exploit a flaw in the packet-reassembly implementation by sending fragmented IPv4 or IPv6 packets, leading to high CPU consumption or packet loss due to reassembly failures. This vulnerability has a CVSS score of 5.0, indicating a network-based attack with low complexity and no authentication required, resulting in partial availability impact. There is no evidence of active exploitation, nor are there public exploit modules available in Metasploit, Nuclei, or ExploitDB. While it has received limited community discussion and media coverage, it is not listed in the CISA KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
2.4.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.4.1:*:*:*:*:*:*:*
2.5.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.5.0:*:*:*:*:*:*:*
2.5.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.5.1:*:*:*:*:*:*:*
2.5.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.5.2:*:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:2.6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.81%
Probability of exploitation in next 30 days
EPSS Percentile
76.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0181 is in the 63rd percentile among its peer group of 23,725 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, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 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/viewAlert.x
Vendor Advisory
securitytracker.com / id/1033122