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CVE-2021-37145

24
FAUCET Score

CVE-2021-37145 is a command-injection vulnerability affecting Poly CX5500 and CX5100 devices running firmware version 1.3.5. This flaw allows an authenticated attacker, via a Telnet connection, to achieve Privilege Escalation and Remote Code Execution. Rated with a CVSS score of 7.2 (High), the vulnerability requires high privileges but has low attack complexity, posing a significant risk to confidentiality, integrity, and availability. While the affected products are no longer supported by the vendor, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and no evidence of active exploitation, media coverage, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.5CPE matchmatch criteria
cpe:2.3:o:poly:cx5500_firmware:1.3.5:*:*:*:*:*:*:*
1.3.5CPE matchmatch criteria
cpe:2.3:o:poly:cx5100_firmware:1.3.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.05%
Probability of exploitation in next 30 days
EPSS Percentile
79.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0205 is in the 74th percentile among its peer group of 5,538 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.polycom.com / content/dam/polycom-support/global/documentation/security-bulletin-cx5100-cx5500-authenticated-v1-0.pdf
Vendor Advisory
support.polycom.com / content/support.html
Vendor Advisory