Cisco IOS before 15.3(2)T, when scansafe is enabled, allows remote attackers to cause a…
Priority LOW 22CWE-189Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.
Summary
Cisco IOS before 15.3(2)T, when scansafe is enabled, allows remote attackers to cause a denial of service (latency) via SYN packets that are not accompanied by SYN-ACK packets from the Scan Safe Tower, aka Bug ID CSCub85451.
Why it matters now
EPSS 0.01084 65th 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 · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | up to 15.3\(3\)m2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.3:*:*:*:*:*:*:* | 15.3 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.3\(2\)s:*:*:*:*:*:*:* | 15.3(2)s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.3\(3\)m:*:*:*:*:*:*:* | 15.3(3)m | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.3\(3\)m1:*:*:*:*:*:*:* | 15.3(3)m1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.3\(3\)s:*:*:*:*:*:*:* | 15.3(3)s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.3s:*:*:*:*:*:*:* | 15.3s | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions up to 15.3\(3\)m2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.3:*:*:*:*:*:*:* Versions 15.3 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.3\(2\)s:*:*:*:*:*:*:* Versions 15.3(2)s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.3\(3\)m:*:*:*:*:*:*:* Versions 15.3(3)m Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.3\(3\)m1:*:*:*:*:*:*:* Versions 15.3(3)m1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.3\(3\)s:*:*:*:*:*:*:* Versions 15.3(3)s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.3s:*:*:*:*:*:*:* Versions 15.3s Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2012-4651
- 2026-10-03 Alias added: GHSA-49rh-g874-x54c
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-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
- 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
Sources
- CVE-2012-4651 · CVE Program
- CVE-2012-4651 · NVD
- FIRST EPSS
- GHSA-49rh-g874-x54c · 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