CVE-2021-28857
CVE-2021-28857 is a high-severity vulnerability in Tp-link Tl-wpa4220 Firmware with a CVSS 3.x base score of 7.5. 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-522.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (66th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-522
- Affected product: Tp-link Tl-wpa4220 Firmware
- Published:
- Last modified:
Description
TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 username and password are sent via the cookie.
Frequently asked questions
- What is CVE-2021-28857?
- TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 username and password are sent via the cookie.
- How severe is CVE-2021-28857?
- CVE-2021-28857 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2021-28857 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-28857?
- CVE-2021-28857 affects Tp-link Tl-wpa4220 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-28857?
- 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-2021-28857 published?
- CVE-2021-28857 was published on 2021-06-15 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:tp-link:tl-wpa4220_firmware:4.0.2:build_20180308_rel.37064:*:*:*:*:*:*
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