Medium severity · published Apr 28, 2021
CVE-2021-3511
Disclosure of sensitive information to an unauthorized user vulnerability in Buffalo broadband routers (BHR-4GRV firmware Ver.1.99 and prior, DWR-HP-G300NH firmware Ver.1.83 and…
4.3
CVSS
0.5%
EPSS
No
On KEV
Description
Disclosure of sensitive information to an unauthorized user vulnerability in Buffalo broadband routers (BHR-4GRV firmware Ver.1.99 and prior, DWR-HP-G300NH firmware Ver.1.83 and prior, HW-450HP-ZWE firmware Ver.1.99 and prior, WHR-300HP firmware Ver.1.99 and prior, WHR-300 firmware Ver.1.99 and prior, WHR-G301N firmware Ver.1.86 and prior, WHR-HP-G300N firmware Ver.1.99 and prior, WHR-HP-GN firmware Ver.1.86 and prior, WPL-05G300 firmware Ver.1.87 and prior, WZR-450HP-CWT firmware Ver.1.99 and prior, WZR-450HP-UB firmware Ver.1.99 and prior, WZR-HP-AG300H firmware Ver.1.75 and prior, WZR-HP-G300NH firmware Ver.1.83 and prior, WZR-HP-G301NH firmware Ver.1.83 and prior, WZR-HP-G302H firmware Ver.1.85 and prior, WZR-HP-G450H firmware Ver.1.89 and prior, WZR-300HP firmware Ver.1.99 and prior, WZR-450HP firmware Ver.1.99 and prior, WZR-600DHP firmware Ver.1.99 and prior, WZR-D1100H firmware Ver.1.99 and prior, FS-HP-G300N firmware Ver.3.32 and prior, FS-600DHP firmware Ver.3.38 and prior, FS-R600DHP firmware Ver.3.39 and prior, and FS-G300N firmware Ver.3.13 and prior) allows remote unauthenticated attackers to obtain information such as configuration via unspecified vectors.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BF
Bhr-4grv Firmware · Buffalo
before 2.00 · source: NVD
DF
Dwr-hp-g300nh Firmware · Buffalo
before 1.84 · source: NVD
FF
Fs-600dhp Firmware · Buffalo
before 3.40 · source: NVD
FF
Fs-g300n Firmware · Buffalo
before 3.14 · source: NVD
FF
Fs-hp-g300n Firmware · Buffalo
before 3.33 · source: NVD
FF
Fs-r600dhp Firmware · Buffalo
before 3.40 · source: NVD
HF
Hw-450hp-zwe Firmware · Buffalo
before 2.00 · source: NVD
WF
Whr-300 Firmware · Buffalo
before 2.00 · source: NVD
WF
Whr-300hp Firmware · Buffalo
before 2.00 · source: NVD
WF
Whr-g301n Firmware · Buffalo
before 1.87 · source: NVD
WF
Whr-hp-g300n Firmware · Buffalo
before 2.00 · source: NVD
WF
Whr-hp-gn Firmware · Buffalo
before 1.87 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3511
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3511
Third Party Advisory
https://jvn.jp/en/vu/JVNVU99235714/index.html
Vendor Advisory
https://www.buffalo.jp/news/detail/20210427-01.html
More from Bhr-4grv Firmware
8.8
CVE-2022-40966
Authentication bypass vulnerability in multiple Buffalo network devices allows a network-adjacent attacker to bypass authentication and access the device
8.8
CVE-2021-3512
Improper access control vulnerability in Buffalo broadband routers (BHR-4GRV firmware Ver.1.99 and prior, DWR-HP-G300NH firmware Ver.1.83 and prior, HW-450HP-ZWE firmware Ver.1.99…
6.8
CVE-2022-39044
Hidden functionality vulnerability in multiple Buffalo network devices allows a network-adjacent attacker with an administrative privilege to execute an arbitrary OS command
6.5
CVE-2016-4816
BUFFALO WZR-600DHP3 devices with firmware 2.16 and earlier and WZR-S600DHP devices allow remote attackers to discover credentials and other sensitive information via unspecified…