uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error
Published Mar 16, 2020
7.5
HIGHCVSS 3.1
EPSS 1.55%
Description
uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both "Transfer-Encoding: chunked" and a large negative Content-Length value.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.55% (0.01551) | 74.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.55% (0.01551) | 71.78th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.97% (0.00975) | 74.66th | v4 (v2025.03.14) |
| Mar 29, 2025 | 10.63% (0.10631) | 88.75th | v4 (v2025.03.14) |
| Mar 28, 2025 | 0.97% (0.00975) | 74.66th | v4 (v2025.03.14) |
| Mar 27, 2025 | 10.63% (0.10631) | 92.21th | v4 (v2025.03.14) |
| Mar 20, 2025 | 0.97% (0.00975) | 74.73th | v4 (v2025.03.14) |
| Mar 19, 2025 | 10.63% (0.10631) | 92.35th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.12% (0.00116) | 45.95th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.12% (0.00116) | 45.90th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.12% (0.00116) | 43.82th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.50% (0.04499) | 88.81th | v2 (v2022.01.01) |
| Jun 28, 2022 | 4.50% (0.04499) | 87.98th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- https://github.com/openwrt/openwrt/commits/master x_refsource_MISCPatchThird Party Advisory
- https://openwrt.org/advisory/2020-01-13-1 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/openwrt/openwrt/commits/master | x_refsource_MISCPatchThird Party Advisory | |
| https://openwrt.org/advisory/2020-01-13-1 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.