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
Published Jul 29, 2003
5.0
MEDIUMCVSS 2.0
EPSS 3.20%
Description
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.
Affected products
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.20% (0.03202) | 87.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.20% (0.03202) | 86.44th | v5 (v2026.06.15) |
| Jun 10, 2026 | 2.15% (0.02149) | 84.61th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.91% (0.00912) | 73.74th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.93% (0.01929) | 72.41th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.91% (0.00912) | 74.23th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.84% (0.00839) | 82.78th | v3 (v2023.03.01) |
| May 26, 2024 | 0.84% (0.00839) | 82.07th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.52% (0.00518) | 76.08th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.52% (0.00518) | 73.16th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (5)
- http://archives.neohapsis.com/archives/vulnwatch/2003-q3/0056.html mailing-listx_refsource_VULNWATCHVendor Advisory
- http://www.cisco.com/warp/public/707/cisco-sn-20030724-ios-enum.shtml vendor-advisoryx_refsource_CISCO
- http://www.kb.cert.org/vuls/id/886796 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.vigilante.com/inetsecurity/advisories/VIGILANTE-2003002.htm x_refsource_MISC
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5824 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://archives.neohapsis.com/archives/vulnwatch/2003-q3/0056.html | mailing-listx_refsource_VULNWATCHVendor Advisory | |
| http://www.cisco.com/warp/public/707/cisco-sn-20030724-ios-enum.shtml | vendor-advisoryx_refsource_CISCO | |
| http://www.kb.cert.org/vuls/id/886796 | third-party-advisoryx_refsource_CERT-VNUS Government Resource | |
| http://www.vigilante.com/inetsecurity/advisories/VIGILANTE-2003002.htm | x_refsource_MISC | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5824 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.