CVE-2020-28593: A unauthenticated backdoor exists in the configuration server functionality of Cosori Smart 5.8-Quart Air Frye

This week

HIGH 8.1REMOTEMITIGATE

CVE-2020-28593 is a high-severity flaw (CVSS 8.1) affecting cs158-af firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A unauthenticated backdoor exists in the configuration server functionality of Cosori Smart 5.8-Quart Air Fryer CS158-AF 1.1.0. A specially crafted JSON object can lead to code execution. An attacker can send a malicious packet to trigger this vulnerability.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-912
Published	2021-04-15
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: cosori

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-04-15 14:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

cosori cs158-af firmware MITIGATE

Affected: 1.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-28593?

cs158-af firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28593 being exploited?

CVE-2020-28593 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-28593 affect?

CVE-2020-28593 affects cs158-af firmware. Severity is high (CVSS 8.1). A unauthenticated backdoor exists in the configuration server functionality of Cosori Smart 5.8-Quart Air Fryer CS158-AF 1.1.0. A specially crafted JSON object can lead to code execution. An attacker can send a malicious packet to trigger t

How urgent is CVE-2020-28593?

Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-28592 CRITICAL 9.8 MITIGATE A heap-based buffer overflow vulnerability exists in the configuration server functionality of the Cosori Smar

References

← Back to latest CVEs