CVE-2020-7248
libubox in OpenWrt before 18.06.7 and 19.x before 19.07.1 has a tagged binary data JSON serialization vulnerability that may cause a stack based buffer overflow.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
libubox in OpenWrt before 18.06.7 and 19.x before 19.07.1 has a tagged binary data JSON serialization vulnerability that may cause a stack based buffer overflow.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.49% probability · 85th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- openwrt/openwrt
- Source
- cve@mitre.org
EPSS 2.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/openwrt/openwrt/commits/masterPatch, Third Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-7248#range-4512438Third Party Advisory, US Government Resource
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
- https://github.com/openwrt/openwrt/commits/masterPatch, Third Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-7248#range-4512438Third Party Advisory, US Government Resource
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
- https://openwrt.org/advisory/2020-01-31-2Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.