CVE-2005-1021
Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a...
Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a TACACS+ server, allows remote attackers to cause a denial of service (memory consumption) via an incorrect username or password.
Exploit likelihood
What each source reports
NVD Score used
Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a TACACS+ server, allows remote attackers to cause a denial of service (memory consumption) via an incorrect username or password.
- Record
CVE-2005-1021- CVSS 2.0
- 7.1 High
AV:N/AC:M/Au:N/C:N/I:N/A:C - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a TACACS+ server, allows remote attackers to cause a denial of service (memory consumption) via an incorrect username or password.
- Record
CVE-2005-1021- Updated
- 2026-11-02
EUVDEUVD-2005-1024 No score
Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a TACACS+ server, allows remote attackers to cause a denial of service (memory consumption) via an incorrect username or password.
- Record
EUVD-2005-1024- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-phww-46gm-5fww No score
Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a...
Memory leak in Secure Shell (SSH) in Cisco IOS 12.0 through 12.3, when authenticating against a TACACS+ server, allows remote attackers to cause a denial of service (memory consumption) via an incorrect username or password.
- Record
GHSA-phww-46gm-5fww- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2005-1021 is a high vulnerability (CVSS 7.1) in Cisco Ios, published April 9, 2005. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.83%, the 79th percentile. No source names a fixed version.
References
securitytracker.com/alerts/2005/Apr/1013655.html
exchange.xforce.ibmcloud.com/vulnerabilities/19991
osvdb.org/15303
securityfocus.com/bid/13042
secunia.com/advisories/14854
cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5687
nvd.nist.gov/vuln/detail/CVE-2005-1021
github.com/advisories/GHSA-phww-46gm-5fww