Cisco · IOS, XR, and XE Software
CVE-2018-0167
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
What it is
Multiple Buffer Overflow vulnerabilities in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. Cisco Bug IDs: CSCuo17183, CSCvd73487.
CISA: There is a buffer overflow vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software which could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: March 17, 2022
- Added to the CISA list
- March 3, 2022
- Published
- March 28, 2018
- Severity
- High 8.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 3.4% in the top 11.4% of all known vulnerabilities
- Weakness
- CWE-119
- More details
- NVD · CVE.org · CISA
All references (6)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- http://www.securitytracker.com/id/1040586
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- http://www.securityfocus.com/bid/103564
More exploited flaws from Cisco
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Mar 3, 2022 | Buffer Overflow | IOS, XR, and XE Software | High 8.0 | 3.5% |
| Oct 14, 2026 | Relative Path Traversal | Secure Email Gateway | Critical 9.8 | 2.2% |
| Sep 30, 2026 | Hex Encoding | Catalyst SD-WAN Manager | Critical 9.8 | 39% |
| Sep 16, 2026 | Incorrect Use of Privileged APIs | Identity Services Engine | Critical 10.0 | 76% |
| Sep 14, 2026 | SQL Injection | Secure Email Gateway | Critical 9.8 | 30% |
| Sep 9, 2026 | Firewall Management Center Authentication Bypass Using an Alternate Path or Channel | Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | Critical 10.0 | 88% |
| Aug 11, 2026 | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) | High 8.6 | 1.0% |
| Jul 29, 2026 | Secure Firewall Management Center Use of Hard-coded Password | Secure Firewall Management Center (FMC) | Medium 5.3 | 35% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.