CVE-2001-0537
HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization…
- 9.3HighCVSS base score
- 68.5%Exploitation in 30 daysEPSS · top 0.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 6Public exploitsMetasploit, Nuclei and Exploit-DB
Description
HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization is being used, by specifying a high access level in the URL.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module, a Nuclei template and 4 Exploit-DB entries for it.
Show the exploits6
Metasploit modules1 module
- Cisco IOS HTTP Unauthorized Administrative Access (Metasploit module) (opens in a new tab)
auxiliary/scanner/http/cisco_ios_auth_bypassRank normaldisclosed 27 Jun 2001
Nuclei templates1 template
- Cisco IOS HTTP Configuration - Authentication Bypass (Nuclei template) (opens in a new tab)
http/cves/2001/CVE-2001-0537.yamlSeverity critical
Exploit-DB4 entries
- Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (1) (Exploit-DB entry) (opens in a new tab)
EDB-ID 20975remote, hardwarepublished 27 Jun 2001Verified
- Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (2) (Exploit-DB entry) (opens in a new tab)
EDB-ID 20976remote, hardwarepublished 27 Jun 2001Verified
- Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (4) (Exploit-DB entry) (opens in a new tab)
EDB-ID 20978remote, hardwarepublished 27 Jun 2001Verified
- Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (3) (Exploit-DB entry) (opens in a new tab)
EDB-ID 20977remote, hardwarepublished 7 Mar 2001Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 8 months later
· 8 months later
Published
- 22 years later
· 22 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 68.5% · top 0.7% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 9.3.
Affected products
n/a
- affected n/a
References
10
- CA-2001-14 (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- 20010629 Re: Cisco Security Advisory: IOS HTTP authorization vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010627 IOS HTTP authorization vulnerability (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- 20010702 ios-http-auth.sh (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010702 Cisco IOS HTTP Configuration Exploit (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 578 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 20010702 Cisco device HTTP exploit... (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- L-106 (opens in a new tab)third-party-advisorygovernment-resourcex_refsource_CIACx_transferred
- 2936 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- cisco-ios-admin-access(6749) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2001-0529 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2001-0537)Record last updated .