How severe is CVE-2021-37774?

CVE-2021-37774 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-37774 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37774?

CVE-2021-37774 affects Tp-link Tl-wdr7660 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37774?

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

When was CVE-2021-37774 published?

CVE-2021-37774 was published on 2023-01-19 and last updated on 2026-06-17.

CVE-2021-37774

CVE-2021-37774 is a high-severity vulnerability in Tp-link Tl-wdr7660 Firmware with a CVSS 3.x base score of 8.0. 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Tp-link Tl-wdr7660 Firmware
Published: 2023-01-19
Last modified: 2026-06-17

Description

An issue was discovered in function httpProcDataSrv in TL-WDR7660 2.0.30 that allows attackers to execute arbitrary code.

Frequently asked questions

What is CVE-2021-37774?: An issue was discovered in function httpProcDataSrv in TL-WDR7660 2.0.30 that allows attackers to execute arbitrary code.
How severe is CVE-2021-37774?: CVE-2021-37774 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-37774 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37774?: CVE-2021-37774 affects Tp-link Tl-wdr7660 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37774?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-37774 published?: CVE-2021-37774 was published on 2023-01-19 and last updated on 2026-06-17.

References

https://github.com/fishykz/TP-POC

Affected products (1)

cpe:2.3:o:tp-link:tl-wdr7660_firmware:2.0.30:*:*:*:*:*:*:*

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CVE-2023-46373 — Critical (CVSS 9.8): TP-Link TL-WDR7660 2.0.30 has a stack overflow vulnerability via the function deviceInfoJsonToBincauses.
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CVE-2024-48714 — Medium (CVSS 6.5): In TP-Link TL-WDR7660 v1.0, the guestRuleJsonToBin function handles the parameter string name without checking it,…
CVE-2024-48713 — Medium (CVSS 6.5): In TP-Link TL-WDR7660 1.0, the wacWhitelistJsonToBin function handles the parameter string name without checking it,…

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