Critical File handling exploit reference

CVE-2020-36898 — QiHang Media Web Digital Signage 3.0.9 Unauthenticated Arbitrary File Deletion

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.

Published Dec 10, 2025 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulnCheck

Moderate

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 1.7% (30-day exploitation probability)+12
Technical severity (critical)+10
CISA SSVC: exploitation "poc"+5
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

1.74%

ahead of 77% of scored CVEs · Oct 14, 2026

Affects

Howfor

Qihang Media Web Digital Signage and 1 more

CVSS base

9.1

Critical · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Howfor Qihang Media Web Digital Signage, Shenzhen Xingmeng Qihang Media Co., Ltd.Guangzhou Hefeng Automation Technology Co., Ltd. QiHang Media Web Digital Signage).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (file handling), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Howfor	Qihang Media Web Digital Signage	version 3.0.9	Vulnerable	NIST National Vulnerability Database
Shenzhen Xingmeng Qihang Media Co., Ltd.Guangzhou Hefeng Automation Technology Co., Ltd.	QiHang Media Web Digital Signage	version 3.0.9	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
8.8	CVSS 4.0	High	—	—	disclosure@vulncheck.com via NIST National Vulnerability Database
8.8	CVSS 4.0	High	—	—	VulnCheck via CVE Program (cve.org) e CISA ADP
9.1	CVSS 3.1	Critical	3.9	5.2	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-22 · Path Traversal

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 1.74%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Monitor file creation in web directories and paths with traversal sequences (../).

web/proxy/WAF logsnetwork IDS/IPSfile integrity (FIM)endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · shenzhen xingmeng qihang media co., ltd.guangzhou hefeng automation technology co., ltd./qihang media web digital signag
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 9.1
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
2025
CVE published
Dec 10, 2025 · VulnCheck

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

4 on the record

www.howfor.com
Product, product, NIST National Vulnerability Database
www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5580.php
Exploit, Third Party Advisory, vendor-advisory, vdb-entry, NIST National Vulnerability Database
www.exploit-db.com/exploits/48749
Exploit, Third Party Advisory, VDB Entry, exploit, NIST National Vulnerability Database
www.vulncheck.com/advisories/qihang-media-web-digital-signage-unauthenticated-arbitrary
Third Party Advisory, third-party-advisory, NIST National Vulnerability Database

Elsewhere on this site

Howfor
every CVE for this vendor

File handling
same class

CWE-22
other pages naming this weakness

Related CVEs (same products)

High CVE-2020-36896 QiHang Media Web Digital Signage 3.0.9 Cleartext Credentials Disclosure Dec 10, 2025
Critical CVE-2020-36897 QiHang Media Web Digital Signage 3.0.9 Unauthenticated Remote Code Execution Dec 10, 2025
High CVE-2020-36899 QiHang Media Web Digital Signage 3.0.9 Unauthenticated Arbitrary File Disclosure Dec 10, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2020-36898 is "QiHang Media Web Digital Signage 3.0.9 Unauthenticated Arbitrary File Deletion", rated Critical. It affects Qihang Media Web Digital Signage (Howfor); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.1 describes technical severity. EPSS 1.74% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.