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CVE-2017-3850

17
FAUCET Score

CVE-2017-3850 is a denial-of-service (DoS) vulnerability in the Autonomic Networking Infrastructure (ANI) feature of Cisco IOS and IOS XE Software, affecting versions 15.4-15.6 and 3.7-3.18/16 respectively. It stems from incomplete input validation of crafted IPv6 packets, allowing an unauthenticated, remote attacker to cause a device reload. Rated Medium (CVSS 5.9), exploitation requires a reachable IPv6 interface and is considered high complexity due to specific packet crafting. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it received limited media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
15.2\(3\)eCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(3\)e:*:*:*:*:*:*:*
15.2\(3\)e1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(3\)e1:*:*:*:*:*:*:*
15.2\(3\)e2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(3\)e2:*:*:*:*:*:*:*
15.2\(3\)e3CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(3\)e3:*:*:*:*:*:*:*
15.2\(4\)eCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(4\)e:*:*:*:*:*:*:*

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
2.49%
Probability of exploitation in next 30 days
EPSS Percentile
83.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0249 is in the 73rd percentile among its peer group of 19,958 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, 0.0 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 (1)

ciscoworkaround availablevia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170320-aniipv6
MitigationVendor Advisory
securityfocus.com / bid/96971
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038065
Third Party AdvisoryVDB Entry