# CVE-2020-28951 — Openwrt

> As of 2024-08-04, CVE-2020-28951 is a CRITICAL-severity vulnerability in Openwrt, CVSS v3.1 9.8, EPSS 1.7% (75.1th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2020-28951, most recently “VEXAIoT: Autonomous Multi-Agent LLM Framework Automates End-to-End IoT Vulnerability Discovery and Exploitation (95% Success Rate)”.

**Last updated:** 2024-08-04

## What is CVE-2020-28951?

libuci in OpenWrt before 18.06.9 and 19.x before 19.07.5 may encounter a use after free when using malicious package names. This is related to uci_parse_package in file.c and uci_strdup in util.c.

The record classifies CVE-2020-28951 under weakness class [CWE-416](https://cwe.mitre.org/data/definitions/416.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 2134 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 1.7% probability of exploitation in the next 30 days, higher than 75.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 7.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2020-11-19, last modified 2024-08-04

## Is CVE-2020-28951 being exploited?

No public exploitation evidence for CVE-2020-28951 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2024-08-04. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Openwrt**: Openwrt

## How to fix CVE-2020-28951

No vendor patch reference has been recorded for CVE-2020-28951 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2020-28951

1 tracked threat in the Threadlinqs corpus references CVE-2020-28951, either in the campaign’s CVE list or as an indicator on the campaign record.

- [VEXAIoT: Autonomous Multi-Agent LLM Framework Automates End-to-End IoT Vulnerability Discovery and Exploitation (95% Success Rate)](https://intel.threadlinqs.com/threat/TL-2026-1261) — MEDIUM · 2026-07-13

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-07-13. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [git.openwrt.org](https://git.openwrt.org/?p=project/uci.git%3Ba=commit%3Bh=a3e650911f5e6f67dcff09974df3775dfd615da6)
- [git.openwrt.org](https://git.openwrt.org/?p=openwrt/openwrt.git%3Ba=commit%3Bh=5625f5bc36954d644cb80adf8de47854c65d91c3)
- [git.openwrt.org](https://git.openwrt.org/?p=openwrt/openwrt.git%3Ba=log%3Bh=refs/tags/v18.06.9)

Canonical: https://intel.threadlinqs.com/cve/CVE-2020-28951
Full detection coverage and IOCs for threats exploiting CVE-2020-28951 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp