CVE-2000-0380

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 85% probability of exploitation within the next 30 days (top 0.6% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 35%CVSS: —Exploit: NoneExposed: 0

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

The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.

CVSS v3
—
EG Score
9.0(low)
EPSS
98.2%
KEV
Not listed

Published

April 26, 2000

Last Modified

June 16, 2026

References (8)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 15× 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. 2026-07-04 06:26 UTCEPSS rescore
  5. 2026-07-02 14:00 UTCEPSS rescore
  6. 2026-06-28 14:02 UTCEPSS rescore
  7. 2026-06-27 03:04 UTCEPSS rescore
  8. 2026-06-24 14:01 UTCEPSS rescore
  9. 2026-06-23 21:29 UTCEPSS rescore
  10. 2026-06-22 14:22 UTCEPSS rescore
  11. 2026-06-21 01:56 UTCEPSS rescore
  12. 2026-06-18 17:49 UTCEPSS rescore
  13. 2026-06-18 17:49 UTCEPSS rescore
  14. 2026-06-17 17:49 UTCEPSS rescore
  15. 2026-06-16 17:49 UTCEPSS rescore
  16. 2026-06-12 23:07 UTCEPSS rescore
  17. 2026-06-10 22:13 UTCEPSS rescore
  18. 2026-06-10 13:17 UTCEPSS rescore
  19. 2026-06-08 14:13 UTCEPSS rescore
  20. 2026-06-07 15:21 UTCEPSS rescore
  21. 2026-06-06 13:44 UTCEPSS rescore
  22. 2026-06-04 13:09 UTCEPSS rescore
  23. 2026-06-01 13:48 UTCEPSS rescore
  24. 2026-05-31 22:27 UTCEPSS rescore
  25. 2026-05-31 21:44 UTCEG score recompute
Show 14 more
  1. 2026-05-31 21:44 UTCGHSA enrichment
  2. 2026-05-31 00:13 UTCEPSS rescore
  3. 2026-05-31 00:13 UTCEPSS rescore
  4. 2026-05-28 13:42 UTCEPSS rescore
  5. 2026-05-28 13:42 UTCEPSS rescore
  6. 2026-05-28 13:42 UTCEPSS rescore
  7. 2026-05-28 13:42 UTCEPSS rescore
  8. 2026-05-26 07:16 UTCEPSS rescore
  9. 2026-05-26 07:16 UTCEPSS rescore
  10. 2026-05-24 16:42 UTCEPSS rescore
  11. 2026-05-22 21:15 UTCEPSS rescore
  12. 2026-05-20 22:36 UTCEPSS rescore
  13. 2026-05-18 21:29 UTCEPSS rescore
  14. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-19882✓ verified
    First seen Apr 26, 2000

    Cisco IOS 11.x/12.x - HTTP %%

    Open source ↗
  • Metasploitauxiliary/dos/cisco/ios_http_percentpercent✓ verified
    First seen Apr 26, 2000

    Cisco IOS HTTP GET /%% Request Denial of Service

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2000-0380?
CVE-2000-0380 is a none vulnerability published on April 26, 2000. The IOS HTTP service in Cisco routers and switches running IOS 11.1 through 12.1 allows remote attackers to cause a denial of service by requesting a URL that contains a %% string.
When was CVE-2000-0380 disclosed?
CVE-2000-0380 was first published in the National Vulnerability Database on April 26, 2000, 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-2000-0380 actively exploited?
CVE-2000-0380 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2000-0380?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2000-0380, 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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