CRITICAL
Off-by-one buffer overflow in Basic Authentication in Acme Labs thttpd 1.95 through 2.20 allows remote attackers to cause a denial of service and possibly execute arbitrary code
Published Jun 21, 2005
9.8
CRITICALCVSS 3.1
EPSS 4.84%
Description
Off-by-one buffer overflow in Basic Authentication in Acme Labs thttpd 1.95 through 2.20 allows remote attackers to cause a denial of service and possibly execute arbitrary code.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.84% 0.04837
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.04837
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 (21 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.84% (0.04837) | 91.73th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.84% (0.04837) | 90.83th | v5 (v2026.06.15) |
| May 16, 2026 | 6.88% (0.06884) | 91.47th | v4 (v2025.03.14) |
| Feb 20, 2026 | 13.89% (0.13888) | 94.15th | v4 (v2025.03.14) |
| Dec 28, 2025 | 17.76% (0.17762) | 94.90th | v4 (v2025.03.14) |
| Dec 27, 2025 | 19.07% (0.19066) | 95.15th | v4 (v2025.03.14) |
| Oct 28, 2025 | 17.76% (0.17762) | 94.82th | v4 (v2025.03.14) |
| Oct 27, 2025 | 19.07% (0.19066) | 95.07th | v4 (v2025.03.14) |
| Oct 1, 2025 | 17.76% (0.17762) | 94.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 19.07% (0.19066) | 94.84th | v4 (v2025.03.14) |
| Mar 29, 2025 | 22.99% (0.22990) | 93.39th | v4 (v2025.03.14) |
| Mar 19, 2025 | 19.07% (0.19066) | 94.61th | v4 (v2025.03.14) |
| Mar 18, 2025 | 22.70% (0.22704) | 95.45th | v4 (v2025.03.14) |
| Mar 17, 2025 | 8.73% (0.08730) | 91.85th | v4 (v2025.03.14) |
| Dec 17, 2024 | 16.69% (0.16690) | 96.01th | v3 (v2023.03.01) |
| May 28, 2024 | 7.00% (0.07005) | 93.95th | v3 (v2023.03.01) |
| Feb 8, 2024 | 7.52% (0.07518) | 93.87th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.46% (0.04461) | 91.14th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.29% (0.04291) | 87.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.29% (0.04291) | 86.39th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.29% (0.04291) | 70.14th | v2 (v2022.01.01) |
Weaknesses (1)
References (4)
- http://www.securityfocus.com/archive/1/241310 mailing-listx_refsource_BUGTRAQBroken LinkThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/archive/1/241953 mailing-listx_refsource_BUGTRAQBroken LinkThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/3562 vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7595 vdb-entryx_refsource_XFThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/archive/1/241310 | mailing-listx_refsource_BUGTRAQBroken LinkThird Party AdvisoryVDB Entry | |
| http://www.securityfocus.com/archive/1/241953 | mailing-listx_refsource_BUGTRAQBroken LinkThird Party AdvisoryVDB Entry | |
| http://www.securityfocus.com/bid/3562 | vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/7595 | vdb-entryx_refsource_XFThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jun 21, 2005
Updated Aug 8, 2024
Reserved Jun 21, 2005
Link CVE-2001-1496
CISA Vulnrichment
Updated n/a