How severe is CVE-2021-31726?

CVE-2021-31726 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-31726 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31726?

CVE-2021-31726 affects Akuvox C315 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31726?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-31726 published?

CVE-2021-31726 was published on 2021-04-25 and last updated on 2026-06-17.

CVE-2021-31726

CVE-2021-31726 is a critical-severity vulnerability in Akuvox C315 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Akuvox C315 Firmware
Published: 2021-04-25
Last modified: 2026-06-17

Description

Akuvox C315 115.116.2613 allows remote command Injection via the cfgd_server service. The attack vector is sending a payload to port 189 (default root 0.0.0.0).

Frequently asked questions

What is CVE-2021-31726?: Akuvox C315 115.116.2613 allows remote command Injection via the cfgd_server service. The attack vector is sending a payload to port 189 (default root 0.0.0.0).
How severe is CVE-2021-31726?: CVE-2021-31726 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-31726 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31726?: CVE-2021-31726 affects Akuvox C315 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31726?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-31726 published?: CVE-2021-31726 was published on 2021-04-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:akuvox:c315_firmware:115.116.2613:*:*:*:*:*:*:*

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