HOME VULNERABILITIESCVE-2021-40845

HIGH

CVE-2021-40845

CWE-434Published: September 15, 2021· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

The web part of Zenitel AlphaCom XE Audio Server through 11.2.3.10, called AlphaWeb XE, does not restrict file upload in the Custom Scripts section at php/index.php. Neither the content nor extension of the uploaded files is checked, allowing execution of PHP code under the /cmd directory.

Technical Analysis

CVE-2021-40845 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

zenitel1 product(s)

alphacom xe audio server

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://packetstormsecurity.com/files/164149/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.html

ADVISORYhttp://packetstormsecurity.com/files/164160/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.html

ADVISORYhttps://github.com/ricardojoserf/CVE-2021-40845

ADVISORYhttps://ricardojoserf.github.io/CVE-2021-40845/

ADVISORYhttp://packetstormsecurity.com/files/164149/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.html

ADVISORYhttp://packetstormsecurity.com/files/164160/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.html

ADVISORYhttps://github.com/ricardojoserf/CVE-2021-40845

ADVISORYhttps://ricardojoserf.github.io/CVE-2021-40845/

All References (8)

→

http://packetstormsecurity.com/files/164149/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlThird Party Advisory · VDB Entry

→

http://packetstormsecurity.com/files/164160/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlExploit · Third Party Advisory · VDB Entry

→

https://github.com/ricardojoserf/CVE-2021-40845Exploit · Third Party Advisory

→

https://ricardojoserf.github.io/CVE-2021-40845/Exploit · Third Party Advisory

→

http://packetstormsecurity.com/files/164149/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlThird Party Advisory · VDB Entry

→

http://packetstormsecurity.com/files/164160/Zenitel-AlphaCom-XE-Audio-Server-11.2.3.10-Shell-Upload.htmlExploit · Third Party Advisory · VDB Entry

→

https://github.com/ricardojoserf/CVE-2021-40845Exploit · Third Party Advisory

→

https://ricardojoserf.github.io/CVE-2021-40845/Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2021-40845

CVSS Score8.8 / 10

SeverityHIGH

WeaknessCWE-434

CISA KEVNo

Affected1 vendor(s)

PublishedSep 15, 2021

Related CVEs (CWE-434)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2021-40845 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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