Cisco IOS XE 2.1.0 through 2.4.3 and 2.5.0 on ASR 1000 devices, when NAT Application…
Priority LOW 38CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
Cisco IOS XE 2.1.0 through 2.4.3 and 2.5.0 on ASR 1000 devices, when NAT Application Layer Gateway is used, allows remote attackers to cause a denial of service (Embedded Services Processor crash) via a crafted SIP packet, aka Bug IDs CSCta74749 and CSCta77008.
Why it matters now
EPSS 0.01995 80th 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 · 23
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xe:2.1.0:*:*:*:*:*:*:* | 2.1.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.1.1:*:*:*:*:*:*:* | 2.1.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.1.2:*:*:*:*:*:*:* | 2.1.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.1.3:*:*:*:*:*:*:* | 2.1.3 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.2.1:*:*:*:*:*:*:* | 2.2.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.2.2:*:*:*:*:*:*:* | 2.2.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.2.3:*:*:*:*:*:*:* | 2.2.3 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.3.0:*:*:*:*:*:*:* | 2.3.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.3.0t:*:*:*:*:*:*:* | 2.3.0t | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.3.1t:*:*:*:*:*:*:* | 2.3.1t | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xe:2.1.0:*:*:*:*:*:*:* Versions 2.1.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.1.2:*:*:*:*:*:*:* Versions 2.1.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.1.3:*:*:*:*:*:*:* Versions 2.1.3 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.2.1:*:*:*:*:*:*:* Versions 2.2.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.2.2:*:*:*:*:*:*:* Versions 2.2.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.2.3:*:*:*:*:*:*:* Versions 2.2.3 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.3.0:*:*:*:*:*:*:* Versions 2.3.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.3.0t:*:*:*:*:*:*:* Versions 2.3.0t Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.3.1t:*:*:*:*:*:*:* Versions 2.3.1t Vulnerable ·Cisco
Show 13 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xe:2.3.2:*:*:*:*:*:*:* | 2.3.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.4.0:*:*:*:*:*:*:* | 2.4.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.4.1:*:*:*:*:*:*:* | 2.4.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.4.2:*:*:*:*:*:*:* | 2.4.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.4.3:*:*:*:*:*:*:* | 2.4.3 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:2.5.0:*:*:*:*:*:*:* | 2.5.0 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ios_xe:2.3.2:*:*:*:*:*:*:* Versions 2.3.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.4.1:*:*:*:*:*:*:* Versions 2.4.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.4.2:*:*:*:*:*:*:* Versions 2.4.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.4.3:*:*:*:*:*:*:* Versions 2.4.3 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:2.5.0:*:*:*:*:*:*:* Versions 2.5.0 Vulnerable ·Cisco
- cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-6271
- 2026-10-03 Alias added: GHSA-q5mh-wr5x-96r8
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-2015-6271 · CVE Program
- CVE-2015-6271 · NVD
- FIRST EPSS
- GHSA-q5mh-wr5x-96r8 · 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