CVE-2021-28857 json
TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 username and password are sent via the cookie.
published 2021-06-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15511
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 70%
- public exploits
- 0
- none known
Summary
TP-Link's TL-WPA4220 4.0.2 Build 20180308 Rel.37064 username and password are sent via the cookie.
Exploit prediction
1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- yunus-shn.medium.com https://yunus-shn.medium.com/tp-links-tl-wpa4220-v4-0-cleartext-credentials-in-cookie-7516a2649394 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-522 Insufficiently Protected Credentials
References
-
yunus-shn.medium.com
/tp-links-tl-wpa4220-v4-0-cleartext-credentials-in-cookie-7516a2649394
exploit, third-party-advisory
Sources
- CVE List CVE-2021-28857
- NVD CVE-2021-28857
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.