How severe is CVE-2021-37388?

CVE-2021-37388 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-2021-37388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37388?

CVE-2021-37388 affects Dlink Dir-615 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37388?

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-2021-37388 published?

CVE-2021-37388 was published on 2021-08-06 and last updated on 2026-06-17.

CVE-2021-37388

CVE-2021-37388 is a critical-severity vulnerability in Dlink Dir-615 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Dlink Dir-615 Firmware
Published: 2021-08-06
Last modified: 2026-06-17

Description

A buffer overflow in D-Link DIR-615 C2 3.03WW. The ping_ipaddr parameter in ping_response.cgi POST request allows an attacker to crash the webserver and might even gain remote code execution.

Frequently asked questions

What is CVE-2021-37388?: A buffer overflow in D-Link DIR-615 C2 3.03WW. The ping_ipaddr parameter in ping_response.cgi POST request allows an attacker to crash the webserver and might even gain remote code execution.
How severe is CVE-2021-37388?: CVE-2021-37388 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-2021-37388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37388?: CVE-2021-37388 affects Dlink Dir-615 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37388?: 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-2021-37388 published?: CVE-2021-37388 was published on 2021-08-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-615_firmware:3.03ww:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-615 Firmware

CVE-2018-25115 — Critical (CVSS 9.8): Multiple D-Link DIR-series routers, including DIR-110, DIR-412, DIR-600, DIR-610, DIR-615, DIR-645, and DIR-815…
CVE-2021-42627 — Critical (CVSS 9.8): The WAN configuration page "wan.htm" on D-Link DIR-615 devices with firmware 20.06 can be accessed directly without…
CVE-2019-16920 — Critical (CVSS 9.8): Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The…
CVE-2018-15839 — Critical (CVSS 9.8): D-Link DIR-615 devices have a buffer overflow via a long Authorization HTTP header.
CVE-2014-8361 — Critical (CVSS 9.8): The miniigd SOAP service in Realtek SDK allows remote attackers to execute arbitrary code via a crafted…
CVE-2013-10050 — High (CVSS 8.8): An OS command injection vulnerability exists in multiple D-Link routers (confirmed on DIR-300 rev A v1.05 and DIR-615…

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