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Fencer Intel
critical 9.3

CVE-2001-0537 in the critical feed json

HTTP server for Cisco IOS 11.3 to 12.2 allows attackers to bypass authentication and execute arbitrary commands, when local authorization i…

published 25y ago modified 4mo ago also EUVD-2001-0529

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
68.5%
EPSS 68.5% chance of exploitation in 30 days, percentile 99.3%
public exploits
5
Metasploit and Exploit-DB

Summary

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.

Patch / fix

Is CVE-2001-0537 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. First public exploit (EDB-20977)
  2. Published

Exploit prediction

68.45% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-14).

Exploits and checks

  • Metasploit auxiliary/scanner/http/cisco_ios_auth_bypass Cisco IOS HTTP Unauthorized Administrative Access metasploit auxiliary, normal rank, 2001-06-27
  • EDB-20978 Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (4) remote, 2001-06-27
  • EDB-20977 Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (3) remote, 2001-03-07
  • EDB-20976 Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (2) remote, 2001-06-27
  • EDB-20975 Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (1) remote, 2001-06-27
  • cisco.com http://www.cisco.com/warp/public/707/IOS-httplevel-pub.html referenced PoC, tagged "exploit" by a source, unverified
  • cert.org http://www.cert.org/advisories/CA-2001-14.html referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/2936 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.