Vulnerability Name:

CVE-2022-26639 (CCN-222784)

Assigned:2022-03-06
Published:2022-03-06
Updated:2022-06-05
Summary:TP-LINK TL-WR840N(ES)_V6.20 was discovered to contain a buffer overflow via the DNSServers parameter.
CVSS v3 Severity:7.2 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
6.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
6.0 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.5 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
7.7 High (CCN CVSS v2 Vector: AV:A/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-120
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2022-26639

Source: XF
Type: UNKNOWN
tplink-cve202226639-bo(222784)

Source: CCN
Type: GitHub Web site
tp-link tl-wr840n_DNSServers=.pdf

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/Quadron-Research-Lab/Hardware-IoT/blob/main/tp-link%20tl-wr840n_DNSServers%3D.pdf

Source: CCN
Type: TP-Link Web site
TP-Link TL-WR840N

Vulnerable Configuration:Configuration 1:
  • cpe:/o:tp-link:tl-wr840n_firmware:0.9.1.4.16:*:*:*:*:*:*:*
  • AND
  • cpe:/h:tp-link:tl-wr840n:6.20:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/h:tp-link:tl-wr840n:6.20:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    tp-link tl-wr840n firmware 0.9.1.4.16
    tp-link tl-wr840n 6.20
    tp-link tl-wr840n 6.20