CVE-2001-0537

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 94% probability of exploitation within the next 30 days (top 0.1% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 68%
CISA-KEV: Not listedEPSS: 68%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.3%
KEV
Not listed

Published

July 21, 2001

Last Modified

June 16, 2026

References (20)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 3× in last 7d / 13× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-13 06:07 UTCEPSS rescore
  2. 2026-07-11 08:22 UTCEPSS rescore
  3. 2026-07-08 15:08 UTCEPSS rescore
  4. 2026-07-02 14:00 UTCEPSS rescore
  5. 2026-06-29 14:02 UTCEPSS rescore
  6. 2026-06-23 21:29 UTCEPSS rescore
  7. 2026-06-21 01:56 UTCEPSS rescore
  8. 2026-06-19 19:22 UTCEPSS rescore
  9. 2026-06-18 17:49 UTCEPSS rescore
  10. 2026-06-18 17:49 UTCEPSS rescore
  11. 2026-06-17 17:49 UTCEPSS rescore
  12. 2026-06-16 17:49 UTCEPSS rescore
  13. 2026-06-14 23:13 UTCEPSS rescore
  14. 2026-06-13 22:56 UTCEPSS rescore
  15. 2026-06-10 22:13 UTCEPSS rescore
  16. 2026-06-08 14:13 UTCEPSS rescore
  17. 2026-06-06 13:44 UTCEPSS rescore
  18. 2026-06-05 06:07 UTCEPSS rescore
  19. 2026-06-04 13:09 UTCEPSS rescore
  20. 2026-05-31 20:26 UTCEG score recompute
  21. 2026-05-31 20:26 UTCGHSA enrichment
  22. 2026-05-31 00:13 UTCEPSS rescore
  23. 2026-05-31 00:13 UTCEPSS rescore
  24. 2026-05-27 13:37 UTCEPSS rescore
  25. 2026-05-27 13:37 UTCEPSS rescore
Show 7 more
  1. 2026-05-26 07:16 UTCEPSS rescore
  2. 2026-05-26 07:16 UTCEPSS rescore
  3. 2026-05-24 16:42 UTCEPSS rescore
  4. 2026-05-22 21:15 UTCEPSS rescore
  5. 2026-05-21 22:38 UTCEPSS rescore
  6. 2026-05-18 21:29 UTCEPSS rescore
  7. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(6 references)

Working exploit code is in the public domain (1 Metasploit module) (4 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-20975✓ verified
    First seen Jun 27, 2001

    Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (1)

    Open source ↗
  • Exploit-DBEDB-20976✓ verified
    First seen Jun 27, 2001

    Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (2)

    Open source ↗
  • Exploit-DBEDB-20978✓ verified
    First seen Jun 27, 2001

    Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (4)

    Open source ↗
  • Metasploitauxiliary/scanner/http/cisco_ios_auth_bypass✓ verified
    First seen Jun 27, 2001

    Cisco IOS HTTP Unauthorized Administrative Access

    Open source ↗
  • Exploit-DBEDB-20977✓ verified
    First seen Mar 7, 2001

    Cisco IOS 11.x/12.x - HTTP Configuration Arbitrary Administrative Access (3)

    Open source ↗
  • Nucleihttp/cves/2001/CVE-2001-0537.yaml
    First seen Jan 1, 2001

    Cisco IOS HTTP Configuration - Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2001-0537?
CVE-2001-0537 is a none vulnerability published on July 21, 2001. 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.
When was CVE-2001-0537 disclosed?
CVE-2001-0537 was first published in the National Vulnerability Database on July 21, 2001, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2001-0537 actively exploited?
CVE-2001-0537 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2001-0537?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2001-0537, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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