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CVE-2021-31726

31
FAUCET Score

CVE-2021-31726 is a critical command injection vulnerability affecting Akuvox C315 devices and their firmware, allowing remote attackers to execute arbitrary commands. With a CVSS score of 9.8, this vulnerability can be exploited unauthenticated over the network by sending a malicious payload to port 189, leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
115.116.2613CPE matchmatch criteria
cpe:2.3:o:akuvox:c315_firmware:115.116.2613:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.77%
Probability of exploitation in next 30 days
EPSS Percentile
75.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0177 is in the 64th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

pastebin.com / yv4ajFjD
Third Party Advisory
akuvox.com / ProductsDisp.aspx
Vendor Advisory