Cisco IOS XR 4.2.3, 4.3.0, 4.3.4, and 5.3.1 on ASR 9000 devices allows remote attackers…
Priority LOW 28CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
Cisco IOS XR 4.2.3, 4.3.0, 4.3.4, and 5.3.1 on ASR 9000 devices allows remote attackers to cause a denial of service (CRC and symbol errors, and interface flap) via crafted bit patterns in packets, aka Bug ID CSCuv78548.
Why it matters now
EPSS 0.01739 77th 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xr:4.2.3:*:*:*:*:*:*:* | 4.2.3 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:4.3.0:*:*:*:*:*:*:* | 4.3.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:4.3.4:*:*:*:*:*:*:* | 4.3.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.3.1:*:*:*:*:*:*:* | 5.3.1 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xr:4.2.3:*:*:*:*:*:*:* Versions 4.2.3 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:4.3.0:*:*:*:*:*:*:* Versions 4.3.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:4.3.4:*:*:*:*:*:*:* Versions 4.3.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.3.1:*:*:*:*:*:*:* Versions 5.3.1 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-1376
- 2026-10-03 Alias added: GHSA-h7rx-wpf7-jwpp
References
More Cisco Ios Xr vulnerabilities
- TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
- TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
- TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
- TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
Sources
- CVE-2016-1376 · CVE Program
- CVE-2016-1376 · NVD
- FIRST EPSS
- GHSA-h7rx-wpf7-jwpp · 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