HIGH
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
Published Jun 2, 2000
7.5
HIGHCVSS 3.0
EPSS 19.46%
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.
Affected products
No data.
OR
- 4.0
- 5.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
19.46% 0.19456
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.19456
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (29 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 19.46% (0.19456) | 97.30th | v5 (v2026.06.15) |
| Sep 22, 2026 | 19.46% (0.19456) | 97.25th | v5 (v2026.06.15) |
| Sep 21, 2026 | 17.77% (0.17775) | 97.09th | v5 (v2026.06.15) |
| Sep 20, 2026 | 19.46% (0.19456) | 97.25th | v5 (v2026.06.15) |
| Sep 6, 2026 | 19.61% (0.19607) | 97.21th | v5 (v2026.06.15) |
| Sep 5, 2026 | 17.91% (0.17914) | 97.05th | v5 (v2026.06.15) |
| Aug 30, 2026 | 19.61% (0.19607) | 97.19th | v5 (v2026.06.15) |
| Aug 28, 2026 | 17.91% (0.17914) | 97.03th | v5 (v2026.06.15) |
| Aug 24, 2026 | 19.61% (0.19607) | 97.17th | v5 (v2026.06.15) |
| Aug 23, 2026 | 17.91% (0.17914) | 97.02th | v5 (v2026.06.15) |
| Aug 17, 2026 | 19.61% (0.19607) | 97.15th | v5 (v2026.06.15) |
| Jul 29, 2026 | 18.47% (0.18474) | 96.95th | v5 (v2026.06.15) |
| Jul 26, 2026 | 13.80% (0.13800) | 96.12th | v5 (v2026.06.15) |
| Jul 12, 2026 | 18.47% (0.18474) | 96.90th | v5 (v2026.06.15) |
| Jun 15, 2026 | 19.61% (0.19607) | 97.03th | v5 (v2026.06.15) |
| Dec 28, 2025 | 20.31% (0.20309) | 95.33th | v4 (v2025.03.14) |
| Dec 27, 2025 | 17.30% (0.17304) | 94.85th | v4 (v2025.03.14) |
| Oct 28, 2025 | 20.31% (0.20309) | 95.27th | v4 (v2025.03.14) |
| Oct 27, 2025 | 17.30% (0.17304) | 94.77th | v4 (v2025.03.14) |
| Oct 1, 2025 | 20.31% (0.20309) | 95.36th | v4 (v2025.03.14) |
| Jul 30, 2025 | 17.30% (0.17304) | 94.76th | v4 (v2025.03.14) |
| Mar 19, 2025 | 20.31% (0.20309) | 94.82th | v4 (v2025.03.14) |
| Mar 17, 2025 | 15.79% (0.15791) | 94.23th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.59% (0.00590) | 79.00th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.59% (0.00590) | 77.60th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.59% (0.00590) | 74.94th | v3 (v2023.03.01) |
| Mar 6, 2023 | 9.77% (0.09772) | 94.33th | v2 (v2022.01.01) |
| Apr 1, 2022 | 9.77% (0.09772) | 93.82th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.77% (0.09772) | 87.25th | v2 (v2022.01.01) |
Weaknesses (1)
References (2)
- http://www.securityfocus.com/bid/1101 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-023 vendor-advisoryx_refsource_MS
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/1101 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-023 | vendor-advisoryx_refsource_MS |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jun 2, 2000
Updated Aug 8, 2024
Reserved Apr 26, 2000
Link CVE-2000-0258
CISA Vulnrichment
Updated n/a