How severe is CVE-2021-44864?

CVE-2021-44864 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 none, integrity none, and availability high.

Is CVE-2021-44864 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44864?

CVE-2021-44864 affects Tp-link Wn886n Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44864?

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

When was CVE-2021-44864 published?

CVE-2021-44864 was published on 2022-02-08 and last updated on 2026-06-17.

CVE-2021-44864

CVE-2021-44864 is a medium-severity vulnerability in Tp-link Wn886n Firmware with a CVSS 3.x base score of 6.5. Its EPSS exploit-prediction score of 10% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-120.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Tp-link Wn886n Firmware
Published: 2022-02-08
Last modified: 2026-06-17

Description

TP-Link WR886N 3.0 1.0.1 Build 150127 Rel.34123n is vulnerable to Buffer Overflow. Authenticated attackers can crash router httpd services via /userRpm/PingIframeRpm.htm request which contains redundant & in parameter.

Frequently asked questions

What is CVE-2021-44864?: TP-Link WR886N 3.0 1.0.1 Build 150127 Rel.34123n is vulnerable to Buffer Overflow. Authenticated attackers can crash router httpd services via /userRpm/PingIframeRpm.htm request which contains redundant & in parameter.
How severe is CVE-2021-44864?: CVE-2021-44864 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 none, integrity none, and availability high.
Is CVE-2021-44864 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44864?: CVE-2021-44864 affects Tp-link Wn886n Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44864?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-44864 published?: CVE-2021-44864 was published on 2022-02-08 and last updated on 2026-06-17.

References

https://github.com/zhlu32/cve/blob/main/tplink/wr886n/Tplink-wr886n-V3-Ping-DOS.md

Affected products (1)

cpe:2.3:o:tp-link:wn886n_firmware:1.0.1:build_150127_rel.34123n:*:*:*:*:*:*

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