CVE-2022-26639: tp-link tl-wr840n_firmware Classic Buffer Overflow
CVSS: 7.2v3.1HighModified
Published 28-03-2022Last modified 03-08-2024
Vulnerability summary
CVE-2022-26639 is a high (CVSS 7.2) Classic Buffer Overflow vulnerability in tp-link tl-wr840n_firmware. EPSS estimates a 1.25% chance of exploitation in the next 30 days, higher than 69.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.2/10
010
High · v3.1 (NVD)EPSS score
1.25%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 28-03-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers parameter.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 7.2Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
Medium 6.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.25%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
0.00 pp
From 1.25% on 21-09-2026
21-09-202621-10-2026
EPSS score1.25%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundHardware Iot
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Tp-link1 product
- tl-wr840n_firmware0.9.1.4.16
1 vendor · 1 product
References
1 links- github.com/Quadron-Research-Lab/Hardware-IoT/blob/main/tp-link%20tl-wr840n_DNSServers%3D.pdfX Refsource MISCExploitThird Party Advisory