How severe is CVE-2021-40654?

CVE-2021-40654 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-40654 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-2021-40654?

CVE-2021-40654 affects Dlink Dir-615 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40654?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-40654 published?

CVE-2021-40654 was published on 2021-09-24 and last updated on 2026-06-17.

CVE-2021-40654

CVE-2021-40654 is a medium-severity vulnerability in Dlink Dir-615 Firmware with a CVSS 3.x base score of 6.5. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Dlink Dir-615 Firmware
Published: 2021-09-24
Last modified: 2026-06-17

Description

An information disclosure issue exist in D-LINK-DIR-615 B2 2.01mt. An attacker can obtain a user name and password by forging a post request to the / getcfg.php page

Frequently asked questions

What is CVE-2021-40654?: An information disclosure issue exist in D-LINK-DIR-615 B2 2.01mt. An attacker can obtain a user name and password by forging a post request to the / getcfg.php page
How severe is CVE-2021-40654?: CVE-2021-40654 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-40654 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-2021-40654?: CVE-2021-40654 affects Dlink Dir-615 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40654?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-40654 published?: CVE-2021-40654 was published on 2021-09-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-615_firmware:17.00:*:*:*:*:*:*:*

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-2021-37388 — Critical (CVSS 9.8): A buffer overflow in D-Link DIR-615 C2 3.03WW. The ping_ipaddr parameter in ping_response.cgi POST request allows an…
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…

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Other CWE-863 (Incorrect Authorization) vulnerabilities

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CVE-2026-46595 — Critical (CVSS 10.0): Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of…
CVE-2026-33105 — Critical (CVSS 10.0): Improper authorization in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over…
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