Memory corruption in Cisco IOS, IOS XE, and IOS XR
Priority CRITICAL 97Exploited in the wildCWE-119Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Active In CISA KEV since 2022-03-03CISA due date 2022-03-17
EPSS 0.03354 88th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Cisco IOS, IOS XE, and IOS XR | Cisco IOS, IOS XE, and IOS XR | — | No fix listed | CNA |
- Cisco IOS, IOS XE, and IOS XR Vendor— Affected Cisco IOS, IOS XE, and IOS XR Fixed in — No fix listed CNA
CPE configurations NVD · 24
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:5.2.0.base:*:*:*:*:*:*:* | 5.2.0.base | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:5.2.0.base:*:*:*:*:*:*:* | 5.2.0.base | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 4.1 to before 5.1.3 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ios:5.2.0.base:*:*:*:*:*:*:* Versions 5.2.0.base Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:5.2.0.base:*:*:*:*:*:*:* Versions 5.2.0.base Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* Versions 4.1 to before 5.1.3 Vulnerable ·Cisco
- cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 14 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | up to 15.6.3m1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* | up to 15.6.3m1 | Vulnerable | Cisco |
| cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5900:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | up to 15.2\(6\)e0a | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* | up to 15.2\(6\)e0a | Vulnerable | Cisco |
| cpe:2.3:h:rockwellautomation:allen-bradley_armorstratix_5700:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5400:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5410:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5700:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
| cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | up to 15.2\(4a\)ea5 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* | up to 15.2\(4a\)ea5 | Vulnerable | Cisco |
| cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Rockwell |
- cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions up to 15.6.3m1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions up to 15.6.3m1 Vulnerable ·Cisco
- cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5900:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions up to 15.2\(6\)e0a Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions up to 15.2\(6\)e0a Vulnerable ·Cisco
- cpe:2.3:h:rockwellautomation:allen-bradley_armorstratix_5700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5410:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:h:rockwellautomation:allen-bradley_stratix_5700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions up to 15.2\(4a\)ea5 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions up to 15.2\(4a\)ea5 Vulnerable ·Cisco
- cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Rockwell
Remediation
No fixed version listed by the sources yet.
Timeline
- 2022-03-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2018-0167
- 2026-10-03 Alias added: GHSA-h85m-74j9-4r6m
References
More Cisco Ios vulnerabilities
- TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
- TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
- TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
- TI-2017-04497 Memory corruption in Cisco IOS XE Software KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2018-0167 · CVE Program
- CVE-2018-0167 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-h85m-74j9-4r6m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences