uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness…
Priority LOW 36CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.01551 75th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:* | 18.06.0 – 18.06.5 | Vulnerable | openwrt |
| cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:* | 19.07.0 | Vulnerable | openwrt |
| cpe:2.3:o:openwrt:openwrt:19.07.0:rc1:*:*:*:*:*:* | 19.07.0 rc1 | Vulnerable | openwrt |
| cpe:2.3:o:openwrt:openwrt:19.07.0:rc2:*:*:*:*:*:* | 19.07.0 rc2 | Vulnerable | openwrt |
- cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:* Versions 18.06.0 – 18.06.5 Vulnerable ·openwrt
- cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:* Versions 19.07.0 Vulnerable ·openwrt
- cpe:2.3:o:openwrt:openwrt:19.07.0:rc1:*:*:*:*:*:* Versions 19.07.0 rc1 Vulnerable ·openwrt
- cpe:2.3:o:openwrt:openwrt:19.07.0:rc2:*:*:*:*:*:* Versions 19.07.0 rc2 Vulnerable ·openwrt
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-19945
- 2026-10-03 Alias added: GHSA-v643-533g-6c85
References
More Openwrt vulnerabilities
- TI-2024-13053 Improper input validation in MediaTek MT6890, MT7915, MT7916, MT7981, MT7986 CVSS 3.1CRITICAL 9.8
- TI-2026-44983 Cross-site scripting in openwrt CVSS 3.1CRITICAL 9.6
- TI-2026-40045 OpenWrt: EAD Integer Underflow → Pre-Auth Denial of Service CVSS 3.1MEDIUM 6.5
- TI-2023-09914 LuCI openwrt-22.03 branch git-22.361.69894-438c598 was discovered to contain a stored… CVSS 3.1MEDIUM 5.4
- TI-2026-44982 OpenWrt: ACL bypass and arbitrary root file read via cgi-io cgi-download CVSS 3.1MEDIUM 4.9
- TI-2026-23701 OpenWrt Project has a Stack-based Buffer Overflow vulnerability via IPv6 reverse DNS lookup CVSS 4.0CRITICAL 9.5
Sources
- CVE-2019-19945 · CVE Program
- CVE-2019-19945 · NVD
- FIRST EPSS
- GHSA-v643-533g-6c85 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences