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Fencer Vulns
high 8.8

CVE-2017-6736 kev in the critical feed json

The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow…

published 2017-07-17 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-15790

cvss
8.8
version 3.0, CNA
cisa kev
Exploited
added 2022-03-03
epss
70.4%
EPSS 70.4% chance of exploitation in 30 days, percentile 99.3%
public exploits
1
Exploit-DB

Summary

The Simple Network Management Protocol (SNMP) subsystem of Cisco IOS and IOS XE Software contains multiple vulnerabilities that could allow an authenticated, remote attacker to remotely execute code on an affected system or cause an affected system to reload. An attacker could exploit these vulnerabilities by sending a crafted SNMP packet to an affected system via IPv4 or IPv6. Only traffic directed to an affected system can be used to exploit these vulnerabilities. The vulnerabilities are due to a buffer overflow condition in the SNMP subsystem of the affected software. The vulnerabilities affect all versions of SNMP - Versions 1, 2c, and 3. To exploit these vulnerabilities via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for the affected system. To exploit these vulnerabilities via SNMP Version 3, the attacker must have user credentials for the affected system. A successful exploit could allow the attacker to execute arbitrary code and obtain full control of the affected system or cause the affected system to reload. Customers are advised to apply the workaround as contained in the Workarounds section below. Fixed software information is available via the Cisco IOS Software Checker. All devices that have enabled SNMP and have not explicitly excluded the affected MIBs or OIDs should be considered vulnerable. There are workarounds that address these vulnerabilities.

Patch / fix

cisa required action Apply updates per vendor instructions.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-17-208-04 updated cvss 8.8

Rockwell Automation Allen-Bradley Stratix and ArmorStratix

  • Rockwell Automation Allen-Bradley Stratix 5400 Industrial Ethernet Switches <= 15.2(5)EA.fc4 Rockwell Automation Allen-Bradley Stratix 5410 Industrial Distribution Switches <= 15.2(5)EA.fc4 Rockwell Automation Allen-Bradley Stratix 5700 and ArmorStratixâ„¢ 5700 Industrial Managed Ethernet Switches <= 15.2(5)EA.fc4 Rockwell Automation Allen-Bradley Stratix 5900 Services Router <= 15.2(5)EA.fc4 Rockwell Automation Allen-Bradley Stratix 8000 Modular Managed Ethernet Switche <= 15.2(5)EA.fc4 Rockwell Automation Stratix 8300 Modular Managed Ethernet Switches <= 15.2(5)EA.fc4
    affected: mitigation “For more information about the SNMP vulnerabilities identified by Cisco, see their advisory” tools.cisco.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. Published
  2. First public exploit (EDB-43450)
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-03-24 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Cisco, IOS and IOS XE Software
CISA name
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

70.35% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-43450 Cisco IOS - Remote Code Execution remote, 2018-01-05
  • github.com https://github.com/artkond/cisco-snmp-rce referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • Cisco IOS
  • IntelliShield Universal Product

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.