CVE-2017-3849

mediumpriority · track · 30EPSS 0.008 · 55 %ileEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.76% (55th) EPSS
CVSS 6.1 · medium
Is it mine?
375 products
Check your exposure
Who says so?
3 sources
cnnvd · enisa_euvd · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in the Autonomic Networking Infrastructure (ANI) registrar feature of Cisco IOS Software (possibly 15.2 through 15.6) and Cisco IOS XE Software (possibly 3.7 through 3.18, and 16) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability is due to incomplete input validation on certain crafted packets. An attacker could exploit this vulnerability by sending a crafted autonomic network channel discovery packet to a device that has all the following characteristics: (1) running a Cisco IOS Software or Cisco IOS XE Software release that supports the ANI feature; (2) configured as an autonomic registrar; (3) has a whitelist configured. An exploit could allow the attacker to cause the affected device to reload. Note: Autonomic networking should be configured with a whitelist. Do not remove the whitelist as a workaround. Cisco Bug IDs: CSCvc42717.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.4
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–7.4

v2.06.1mediumAV:A/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 6.5 · impact 6.9
v3.07.4highCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 4
v3.06.8mediumCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.07.4highCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary
04

affected products (375)

Products and version ranges known to be affected.

showing 20 of 375
05

advisories (1)

Vendor and ecosystem advisories describing this.

  • cisco-sa-20170320-aniCisco IOS and IOS XE Software Autonomic Networking Infrastructure Registrar Denial of Service Vulnerability2017-03-20csaf · cisco_csafUS

    A vulnerability in the Autonomic Networking Infrastructure (ANI) registrar feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability is due to incomplete input validation on certain crafted packets. An attacker could exploit this vulnerability by sending a crafted autonomic network channel discovery packet to a device that has all the following characteristics: Running a Cisco IOS Software or Cisco IOS XE Software release that supports the ANI feature Configured as an autonomic registrar Has a whitelist configured An exploit could allow the attacker to cause the affected device to reload. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Note: Also see the companion advisory for affected devices that support Autonomic Networking: Cisco IOS and IOS XE Software IPv6 Denial of Service Vulnerability ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170320-aniipv6"].

06

also known as (3)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcisco_csafNVDCVE.orgMITRE
published 2017-03-21modified 2026-06-17
09

references (9)

External citations — patches, advisories, analysis.

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