CVE-2020-36898: QiHang Media Web Digital Signage 3.0.9 contains an unauthenticated file deletion vulnerability in the QH.aspx

This week

CRITICAL 9.1REMOTEDOWNGRADE

CVE-2020-36898 is a critical-severity flaw (CVSS 9.1) affecting qihang media web digital signage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

QiHang Media Web Digital Signage 3.0.9 contains an unauthenticated file deletion vulnerability in the QH.aspx endpoint that allows remote attackers to delete files without authentication. Attackers can exploit the 'data' parameter by sending a POST request with file paths to delete arbitrary files with web server permissions using directory traversal sequences.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-12-10
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: howfor

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

Am I affected?

Timeline

2025-12-10 21:16 UTCPublished CVE record published
2026-06-17 03:16 UTCUpdated Record last modified

howfor qihang media web digital signage DOWNGRADE

Affected: 3.0.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.9

1. Check installed version

apt-cache policy qihang-media-web-digital-signage || rpm -q qihang-media-web-digital-signage || qihang-media-web-digital-signage --version

2. No fixed release: DOWNGRADE to a release before 3.0.9 (Debian / Ubuntu)

apt-cache madison qihang-media-web-digital-signage sudo apt install qihang-media-web-digital-signage=<VERSION_BEFORE_3.0.9> sudo apt-mark hold qihang-media-web-digital-signage

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list qihang-media-web-digital-signage sudo dnf downgrade qihang-media-web-digital-signage-<VERSION_BEFORE_3.0.9> sudo dnf versionlock add qihang-media-web-digital-signage

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · legofy · FIXED · 1.0.0-43.20261028git6913585.fc46 · FEDORA-2026-e1e60e1e32 · source

sudo dnf upgrade --advisory=FEDORA-2026-e1e60e1e32

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.exploit-db.com/exploits/48749
Write-up: www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5580.php

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-2020-36898?

qihang media web digital signage: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-36898 being exploited?

CVE-2020-36898 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-2020-36898 affect?

CVE-2020-36898 affects qihang media web digital signage. Severity is critical (CVSS 9.1). QiHang Media Web Digital Signage 3.0.9 contains an unauthenticated file deletion vulnerability in the QH.aspx endpoint that allows remote attackers to delete files without authentication. Attackers can exploit the 'data' parameter by sendin

How urgent is CVE-2020-36898?

Priority 61/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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