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CVE-2016-1344

23
FAUCET Score

CVE-2016-1344 is a denial-of-service vulnerability affecting the IKEv2 implementation in Cisco IOS and IOS XE, as well as products from Lenovo, Netgear, Samsung, Sun, Zyxel, and Zzinc. This medium-severity flaw (CVSS 5.9) allows remote, unauthenticated attackers to trigger a device reload by sending specially crafted fragmented packets, though a high attack complexity is noted. There is no evidence of active exploitation, nor are public exploit codes available in Metasploit or ExploitDB. While there's limited community discussion, SecurityWeek reported on Cisco's patches for this and similar DoS flaws.

Impacted Technologies

VendorProductVersion(s)CPE
3.3s_3.3.0sCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.3s_3.3.0s:*:*:*:*:*:*:*
3.3s_3.3.1sCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.3s_3.3.1s:*:*:*:*:*:*:*
3.3s_3.3.2sCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.3s_3.3.2s:*:*:*:*:*:*:*
3.3sg_3.3.0sgCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.3sg_3.3.0sg:*:*:*:*:*:*:*
3.3sg_3.3.1sgCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.3sg_3.3.1sg:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.04%
Probability of exploitation in next 30 days
EPSS Percentile
86.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0305 is in the 79th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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 (4)

ciscovendor investigatingvia nvd_reference
View patch
envoyvendor investigatingvia llm_extracted
mozillavendor investigatingvia llm_extracted
pythonvendor investigatingvia llm_extracted

Vendor Advisories (3)

mozillallm-mozilla-19096d5e54f7548cHIGH

[R1] Cisco Multiple Routers Fragmented IKEv2 Packet Handling Remote Integer Overflow

Apr 5, 2016
envoyllm-envoy-309637d8c9bfc85aHIGH

[R1] Cisco Multiple Routers Fragmented IKEv2 Packet Handling Remote Integer Overflow

Apr 5, 2016
pythonllm-python-57366e8f0b3d33ffHIGH

[R1] Cisco Multiple Routers Fragmented IKEv2 Packet Handling Remote Integer Overflow

Apr 5, 2016

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-ios-ikev2
Vendor Advisory
securityfocus.com / bid/85311
securitytracker.com / id/1035382