How severe is CVE-2021-28858?

CVE-2021-28858 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-28858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28858?

CVE-2021-28858 affects Tp-link Tl-wpa4220 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28858?

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

When was CVE-2021-28858 published?

CVE-2021-28858 was published on 2021-06-15 and last updated on 2026-06-17.

CVE-2021-28858

CVE-2021-28858 is a medium-severity vulnerability in Tp-link Tl-wpa4220 Firmware with a CVSS 3.x base score of 5.5. 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-312.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-312
Affected product: Tp-link Tl-wpa4220 Firmware
Published: 2021-06-15
Last modified: 2026-06-17

Description

TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 does not use SSL by default. Attacker on the local network can monitor traffic and capture the cookie and other sensitive information.

Frequently asked questions

What is CVE-2021-28858?: TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 does not use SSL by default. Attacker on the local network can monitor traffic and capture the cookie and other sensitive information.
How severe is CVE-2021-28858?: CVE-2021-28858 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-28858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28858?: CVE-2021-28858 affects Tp-link Tl-wpa4220 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28858?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28858 published?: CVE-2021-28858 was published on 2021-06-15 and last updated on 2026-06-17.

References

https://yunus-shn.medium.com/tp-links-tl-wpa4220-v4-0-cleartext-transmission-of-sensitive-information-40357c778b84

Affected products (1)

cpe:2.3:o:tp-link:tl-wpa4220_firmware:4.0.2:build_20180308_rel.37064:*:*:*:*:*:*

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