What is CVE-2017-6740?

CVE-2017-6740 is a high-severity vulnerability in Cisco Ios, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2017-07-17.

How severe is CVE-2017-6740?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2017-6740 known to be exploited?

Yes. CVE-2017-6740 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Buffer overflow in Cisco Ios

CVE-2017-6740

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 affect…

Vulnerability class: Buffer Overflow

EPSS: 0.161 (94.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cisco Ios — versions 12.2(18)SXF6, 12.2(18)SO1, 12.2(17d)SXB7
Intellishield Universal Product — versions N/A

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-03-24.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

cisco-sa-20170629-snmp

Frequently asked questions

What is CVE-2017-6740?: CVE-2017-6740 is a high-severity vulnerability in Cisco Ios, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2017-07-17.
How severe is CVE-2017-6740?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2017-6740 known to be exploited?: Yes. CVE-2017-6740 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.