HOMEVULNERABILITIESCVE-2020-29057
HIGH

CVE-2020-29057

NVD-CWE-noinfoPublished: November 24, 2020· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

An issue was discovered on CDATA 72408A, 9008A, 9016A, 92408A, 92416A, 9288, 97016, 97024P, 97028P, 97042P, 97084P, 97168P, FD1002S, FD1104, FD1104B, FD1104S, FD1104SN, FD1108S, FD1204S-R2, FD1204SN, FD1204SN-R2, FD1208S-R2, FD1216S-R1, FD1608GS, FD1608SN, FD1616GS, FD1616SN, and FD8000 devices. It allows remote attackers to cause a denial of service (reboot) by sending random bytes to the telnet server on port 23, aka a "shawarma" attack.

NVD Source

Technical Analysis

CVE-2020-29057 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

cdatatec56 product(s)
72408a firmware72408a9008a firmware9008a9016a firmware9016a92408a firmware92408a92416a firmware92416a9288 firmware9288+44
Source: NVD CPE · 140 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://pierrekim.github.io/blog/2020-07-07-cdata-olt-0day-vulnerabilities.html
ADVISORYhttps://pierrekim.github.io/blog/2020-07-07-cdata-olt-0day-vulnerabilities.html

All References (2)

→
https://pierrekim.github.io/blog/2020-07-07-cdata-olt-0day-vulnerabilities.htmlExploit · Third Party Advisory
→
https://pierrekim.github.io/blog/2020-07-07-cdata-olt-0day-vulnerabilities.htmlExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-29057
CVSS Score7.5 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedNov 24, 2020

Related CVEs (NVD-CWE-noinfo)

CVE-2005-3057
10.0
CVE-2009-1901
10.0
CVE-2000-1241
10.0
CVE-2009-1899
10.0
CVE-2005-4200
10.0
CVE-2021-46433
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-29057 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.COM. CVE data is provided under the NVD usage policy.
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