CVE-2000-0258
— CWE-20
CVSS 7.5 HighEPSS 19.6%
- CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published: 2000-04-12T04:00:00.000
- Last modified: 2025-04-03T01:03:51.193
- CWE: CWE-20
IIS 4.0 and 5.0 allows remote attackers to cause a denial of service by sending many URLs with a large number of escaped characters, aka the “Myriad Escaped Characters” Vulnerability.
Related CVE by CWE
No related CWE found.
Top CVE for Vendor
No vendor taxonomy on this entry.
Recently Exploited Similar Vulnerabilities
No recent KEV-listed items for this vendor/product.
How to fix CVE-2000-0258
CVE-2000-0258 is a high severity vulnerability affecting the affected product.
Description: IIS 4.0 and 5.0 allows remote attackers to cause a denial of service by sending many URLs with a large number of escaped characters, aka the “Myriad Escaped Characters” Vulnerability. Related CVE by CWENo related CWE found.Top CVE for VendorNo vendor taxonomy on this entry.Recently Exploited Similar VulnerabilitiesNo recent KEV-listed items for this vendor/product.
Exploit Difficulty: EASY
⏱️ Time to exploit: < 1 hour
🛠️ Required skills: Basic web security knowledge
💰 Public exploits: Likely available
How to Fix:
- Check if you're running the affected product
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
Description: IIS 4.0 and 5.0 allows remote attackers to cause a denial of service by sending many URLs with a large number of escaped characters, aka the “Myriad Escaped Characters” Vulnerability. Related CVE by CWENo related CWE found.Top CVE for VendorNo vendor taxonomy on this entry.Recently Exploited Similar VulnerabilitiesNo recent KEV-listed items for this vendor/product.
Exploit Difficulty: EASY
⏱️ Time to exploit: < 1 hour
🛠️ Required skills: Basic web security knowledge
💰 Public exploits: Likely available
How to Fix:
1 Identify affected systems
- Check if you're running the affected product
2 Immediate actions
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
3 Verification
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
4 Long-term prevention
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
CWE: CWE-20
Exploit Difficulty Assessment
EASY
Time to Exploit: < 1 hour
Skills Required: Basic web security knowledge
Public Exploits: Likely available
Vulnerability Timeline
Apr 12, 2000
Vulnerability Published
CVE details first published to NVD database
Apr 03, 2025
Last Modified
CVE details were updated
Nov 03, 2025
Imported to Database
Added to this CVE tracking system
Detection Rules & IOCs
No specific detection rules generated for this vulnerability type.
No vendor/product data available.
- http://www.securityfocus.com/bid/1101 [Third Party Advisory, VDB Entry]
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-023 []
- http://www.securityfocus.com/bid/1101 [Third Party Advisory, VDB Entry]
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-023 []
No explicit mitigation/advisory links found in references.