vulnerability / NVI-00000251 / Revision 5
CVE-2017-6737
A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device. The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
8.8 HIGH (3.0)
cisco severity and vector CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; not a measure of customer compromise.
Listed
CISA lists known exploitation. This does not establish exploitation of your system.
As of · CISA
9 HIGH (2.0)
nvd@nist.gov severity; no combined Null risk score.
8.8 HIGH (3.0)
psirt@cisco.com severity; no combined Null risk score.
8.8 HIGH (3.1)
nvd@nist.gov severity; no combined Null risk score.
44.964%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.9878. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
IOS
source listed12.1(3)XI12.2(4)B12.2(15)B12.2(16)B112.2(4)B712.2(4)B212.2(16)B212.2(4)B612.2(4)B112.2(4)B412.2(4)B312.2(4)B812.2(4)B512.2(16)B12.2(2)XA12.2(2)XA212.2(2)XA312.2(2)XA412.2(2)XA512.2(2)XA112.2(2)XB1112.2(2)XB512.2(2)XB212.2(2)XB112.2(2)XB1012.2(2)XB712.2(2)XB312.2(2)XB612.2(2)XB1412.2(2)XB1212.2(2)XB1512.2(2)XB812.2(2)XG12.2(4)XL12.2(4)XL512.2(4)XL212.2(4)XL612.2(4)XL412.2(4)XL112.2(4)XL312.2(4)XM12.2(4)XM312.2(4)XM212.2(4)XM412.2(4)XM112.2(3d)12.2(5b)12.2(1)XS1a12.2(2)XT12.2(2)XT212.2(2)XT312.2(4)XW12.2(4)YA12.2(4)YA612.2(4)YA312.2(4)YA412.2(4)YA112.2(4)YA1112.2(4)YA212.2(4)YA912.2(4)YA812.2(4)YA1212.2(4)YA1012.2(4)YA712.2(2)YC12.2(2)YC412.2(2)YC112.2(2)YC312.2(2)YC212.2(8)YD12.2(8)YD312.2(8)YD212.2(8)YD112.2(4)YF12.2(4)YH12.2(2)XF212.0(7)XK112.0(7)XK12.2(2)DD212.2(1)XD12.2(1)XD212.2(1)XD412.2(1)XD312.2(1)XD112.2(2)XH12.2(2)XH212.2(2)XI12.2(2)XI112.2(2)XI212.2(2)XJ12.2(2)XK12.2(2)XK312.2(2)XK212.2(2)XQ12.2(2)XQ112.2(4)BW12.2(4)BW1a12.2(4)BW212.2(4)BW112.2(2)BX
A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device. The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.
Cisco IOS and IOS XE Software
source listedThe linked source does not supply a complete affected-version range here.
CISA does not supply a complete application-specific affected range here. Follow the linked vendor advisory for version and configuration prerequisites.
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
- investigate
Apply updates per vendor instructions.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. CISA
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- CISA catalog date-added and due-date fields are not the original vulnerability disclosure date or universal legal deadlines.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- CVE-2017-6737 ↗
CVE Program / attributed CNA and ADP · cna record
Observed . CVE content: copyright The MITRE Corporation; CVE Terms of Use and license apply. CNA and ADP publishers retain separate attribution.
- CVE-2017-6737 ↗
CISA · official catalog
Observed . CISA KEV; CC0 1.0. Catalog assertions are not evidence of customer compromise.
- CVE-2017-6737 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
- CVE-2017-6737 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 5 ·
Source facts changed; compare the preserved prior revision.
- Revision 4 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 3 ·
Source facts changed; compare the preserved prior revision.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.