Cisco IOS before 12.2(50)SY1 allows remote authenticated users to cause a denial of…
Priority LOW 32CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- 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 before 12.2(50)SY1 allows remote authenticated users to cause a denial of service (memory consumption) via a sequence of VTY management sessions (aka exec sessions), aka Bug ID CSCtn43662.
Why it matters now
EPSS 0.01061 64th 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 · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:12.2\(33\)sxi4:*:*:*:*:*:*:* | 12.2(33)sxi4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(33\)sxi5:*:*:*:*:*:*:* | 12.2(33)sxi5 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(33\)sxi6:*:*:*:*:*:*:* | 12.2(33)sxi6 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(33\)sxi7:*:*:*:*:*:*:* | 12.2(33)sxi7 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(33\)sxj:*:*:*:*:*:*:* | 12.2(33)sxj | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(50\)sy:*:*:*:*:*:*:* | 12.2(50)sy | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:12.2\(33\)sxi4:*:*:*:*:*:*:* Versions 12.2(33)sxi4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(33\)sxi5:*:*:*:*:*:*:* Versions 12.2(33)sxi5 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(33\)sxi6:*:*:*:*:*:*:* Versions 12.2(33)sxi6 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(33\)sxi7:*:*:*:*:*:*:* Versions 12.2(33)sxi7 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(33\)sxj:*:*:*:*:*:*:* Versions 12.2(33)sxj Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(50\)sy:*:*:*:*:*:*:* Versions 12.2(50)sy Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2012-5036
- 2026-10-03 Alias added: GHSA-p74g-3426-3685
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-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-2012-5036 · CVE Program
- CVE-2012-5036 · NVD
- FIRST EPSS
- GHSA-p74g-3426-3685 · GitHub Advisory Database · CC BY 4.0
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