Access control flaw in Cisco IOS XE 3.16S, 3.17S, 3.18.0S, 3.18.1S, 3.18.0SP
Priority LOW 29CWE-264Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-264.
Summary
A vulnerability in Cisco IOS XE Software running on Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause a configuration integrity change to the vty line configuration on an affected device. This vulnerability affects the following releases of Cisco IOS XE Software running on Cisco cBR-8 Converged Broadband Routers: All 3.16S releases, All 3.17S releases, Release 3.18.0S, Release 3.18.1S, Release 3.18.0SP. More Information: CSCuz62815. Known Affected Releases: 15.5(3)S2.9, 15.6(2)SP. Known Fixed Releases: 15.6(1.7)SP1, 16.4(0.183), 16.5(0.1).
Why it matters now
EPSS 0.01221 68th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Cisco IOS XE 3.16S, 3.17S, 3.18.0S, 3.18.1S, 3.18.0SP | Cisco IOS XE 3.16S, 3.17S, 3.18.0S, 3.18.1S, 3.18.0SP | — | No fix listed | CNA |
- Cisco IOS XE 3.16S, 3.17S, 3.18.0S, 3.18.1S, 3.18.0SP Vendor— Affected Cisco IOS XE 3.16S, 3.17S, 3.18.0S, 3.18.1S, 3.18.0SP Fixed in — No fix listed CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xe:3.16.0cs:*:*:*:*:*:*:* | 3.16.0cs | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.0s:*:*:*:*:*:*:* | 3.16.0s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.1as:*:*:*:*:*:*:* | 3.16.1as | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.1s:*:*:*:*:*:*:* | 3.16.1s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.2as:*:*:*:*:*:*:* | 3.16.2as | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.2bs:*:*:*:*:*:*:* | 3.16.2bs | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.2s:*:*:*:*:*:*:* | 3.16.2s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.3as:*:*:*:*:*:*:* | 3.16.3as | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.3s:*:*:*:*:*:*:* | 3.16.3s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.16.4s:*:*:*:*:*:*:* | 3.16.4s | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xe:3.16.0cs:*:*:*:*:*:*:* Versions 3.16.0cs Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.0s:*:*:*:*:*:*:* Versions 3.16.0s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.1as:*:*:*:*:*:*:* Versions 3.16.1as Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.1s:*:*:*:*:*:*:* Versions 3.16.1s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.2as:*:*:*:*:*:*:* Versions 3.16.2as Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.2bs:*:*:*:*:*:*:* Versions 3.16.2bs Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.2s:*:*:*:*:*:*:* Versions 3.16.2s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.3as:*:*:*:*:*:*:* Versions 3.16.3as Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.3s:*:*:*:*:*:*:* Versions 3.16.3s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.16.4s:*:*:*:*:*:*:* Versions 3.16.4s Vulnerable ·Cisco
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xe:3.17.0s:*:*:*:*:*:*:* | 3.17.0s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.17.1as:*:*:*:*:*:*:* | 3.17.1as | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.17.1s:*:*:*:*:*:*:* | 3.17.1s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.17.2s:*:*:*:*:*:*:* | 3.17.2s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.18.0s:*:*:*:*:*:*:* | 3.18.0s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.18.0sp:*:*:*:*:*:*:* | 3.18.0sp | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:3.18.1s:*:*:*:*:*:*:* | 3.18.1s | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xe:3.17.0s:*:*:*:*:*:*:* Versions 3.17.0s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.17.1as:*:*:*:*:*:*:* Versions 3.17.1as Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.17.1s:*:*:*:*:*:*:* Versions 3.17.1s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.17.2s:*:*:*:*:*:*:* Versions 3.17.2s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.18.0s:*:*:*:*:*:*:* Versions 3.18.0s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.18.0sp:*:*:*:*:*:*:* Versions 3.18.0sp Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:3.18.1s:*:*:*:*:*:*:* Versions 3.18.1s Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-6438
- 2026-10-03 Alias added: GHSA-65gc-9jw6-hwxx
References
More Cisco Ios Xe vulnerabilities
- TI-2023-06904 Cisco is providing an update for the ongoing investigation into observed exploitation of… KEVCVSS 3.1CRITICAL 10.0
- TI-2018-00122 Memory corruption 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-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR 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-2016-6438 · CVE Program
- CVE-2016-6438 · NVD
- FIRST EPSS
- GHSA-65gc-9jw6-hwxx · 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