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CVE-2016-1347

19
FAUCET Score

CVE-2016-1347 describes a denial-of-service vulnerability affecting Cisco IOS versions 15.1 through 15.5, specifically within the Wide Area Application Services (WAAS) Express implementation. A remote attacker can exploit this by sending a specially crafted TCP segment, leading to a device reload. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, resulting in a complete loss of availability. While no public exploit code or active exploitation has been confirmed, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
15.1\(4\)gc2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(4\)gc2:*:*:*:*:*:*:*
15.1\(4\)m6CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(4\)m6:*:*:*:*:*:*:*
15.1\(4\)xb4CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(4\)xb4:*:*:*:*:*:*:*
15.1\(4\)xb5CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(4\)xb5:*:*:*:*:*:*:*
15.1\(4\)xb5aCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1\(4\)xb5a:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
1.49%
Probability of exploitation in next 30 days
EPSS Percentile
71.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0149 is in the 53rd percentile among its peer group of 51,551 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-20160323-l4f
Vendor Advisory
securitytracker.com / id/1035380
Broken Link