Cisco IOS 12.2 and earlier generates a "% Login invalid" message instead of prompting for…
Priority LOW 29CWE-310Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Cisco IOS 12.2 and earlier generates a "% Login invalid" message instead of prompting for a password when an invalid username is provided, which allows remote attackers to identify valid usernames on the system and conduct brute force password guessing, as reported for the Aironet Bridge.
Why it matters now
EPSS 0.03202 88th 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 · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:12.0\(24\)s1:*:*:*:*:*:*:* | 12.0(24)s1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(24.2\)s:*:*:*:*:*:*:* | 12.0(24.2)s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(11\)ja1:*:*:*:*:*:*:* | 12.2(11)ja1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(14.5\):*:*:*:*:*:*:* | 12.2(14.5) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(14.5\)t:*:*:*:*:*:*:* | 12.2(14.5)t | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(15\)zn:*:*:*:*:*:*:* | 12.2(15)zn | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(15.1\)s:*:*:*:*:*:*:* | 12.2(15.1)s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(16\)b:*:*:*:*:*:*:* | 12.2(16)b | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(16.1\)b:*:*:*:*:*:*:* | 12.2(16.1)b | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:12.0\(24\)s1:*:*:*:*:*:*:* Versions 12.0(24)s1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(24.2\)s:*:*:*:*:*:*:* Versions 12.0(24.2)s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(11\)ja1:*:*:*:*:*:*:* Versions 12.2(11)ja1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(14.5\):*:*:*:*:*:*:* Versions 12.2(14.5) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(14.5\)t:*:*:*:*:*:*:* Versions 12.2(14.5)t Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(15\)zn:*:*:*:*:*:*:* Versions 12.2(15)zn Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(15.1\)s:*:*:*:*:*:*:* Versions 12.2(15.1)s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(16\)b:*:*:*:*:*:*:* Versions 12.2(16)b Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(16.1\)b:*:*:*:*:*:*:* Versions 12.2(16.1)b Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2003-0512
- 2026-10-03 Alias added: GHSA-38r2-56qf-x75g
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-2003-0512 · CVE Program
- CVE-2003-0512 · NVD
- FIRST EPSS
- GHSA-38r2-56qf-x75g · GitHub Advisory Database · CC BY 4.0
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