What’s Vulnerable › Vulnerabilities

CVE-2020-7248

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-16 · updated 2026-06-17
• Weakness: CWE-787

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.

Affected products

• openwrt: from 18.06.0 before 18.06.7; 19.07.0, 19.07.0-rc1, 19.07.0-rc2 — fixed in 18.06.7

How to fix

Upgrade to a fixed version: openwrt 18.06.7. Check the vendor advisory for mitigations.

References

• https://github.com/openwrt/openwrt/commits/master
• https://nvd.nist.gov/vuln/detail/CVE-2020-7248#range-4512438
• https://openwrt.org/advisory/2020-01-31-2
• https://openwrt.org/advisory/2020-01-31-2
• https://openwrt.org/advisory/2020-01-31-2
• https://openwrt.org/advisory/2020-01-31-2
• https://github.com/openwrt/openwrt/commits/master
• https://nvd.nist.gov/vuln/detail/CVE-2020-7248#range-4512438
• https://openwrt.org/advisory/2020-01-31-2
• https://openwrt.org/advisory/2020-01-31-2
• https://openwrt.org/advisory/2020-01-31-2
• https://openwrt.org/advisory/2020-01-31-2

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