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CVE-2016-6355

20
FAUCET Score

CVE-2016-6355 describes a memory leak vulnerability in specific versions of Cisco IOS XR software running on ASR 9001 devices. This flaw allows remote, unauthenticated attackers to trigger a denial of service by sending specially crafted fragmented packets, leading to a control-plane protocol outage. With a CVSS score of 7.5 (High), the vulnerability is easily exploitable over the network with low attack complexity, though it only impacts availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.1.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.1.0:*:*:*:*:*:*:*
5.1.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.1.1:*:*:*:*:*:*:*
5.1.1.k9secCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.1.1.k9sec:*:*:*:*:*:*:*
5.1.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.1.2:*:*:*:*:*:*:*
5.1.3CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.87%
Probability of exploitation in next 30 days
EPSS Percentile
85.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0287 is in the 74th percentile among its peer group of 51,485 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

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-20160810-iosxr
Vendor Advisory
securityfocus.com / bid/92399
securitytracker.com / id/1036585