What’s Vulnerable › Vulnerabilities

CVE-2023-26588

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-04-11 · updated 2026-06-17
• Weakness: CWE-668

Description

Use of hard-coded credentials vulnerability in Buffalo network devices allows an attacker to access the debug function of the product. The affected products and versions are as follows: BS-GSL2024 firmware Ver. 1.10-0.03 and earlier, BS-GSL2016P firmware Ver. 1.10-0.03 and earlier, BS-GSL2016 firmware Ver. 1.10-0.03 and earlier, BS-GS2008 firmware Ver. 1.0.10.01 and earlier, BS-GS2016 firmware Ver. 1.0.10.01 and earlier, BS-GS2024 firmware Ver. 1.0.10.01 and earlier, BS-GS2048 firmware Ver. 1.0.10.01 and earlier, BS-GS2008P firmware Ver. 1.0.10.01 and earlier, BS-GS2016P firmware Ver. 1.0.10.01 and earlier, and BS-GS2024P firmware Ver. 1.0.10.01 and earlier

Affected products

• Buffalo Bs-Gs2008 Firmware: through 1.0.10.01
• Buffalo Bs-Gs2008P Firmware: through 1.0.10.01
• Buffalo Bs-Gs2016 Firmware: through 1.0.10.01
• Buffalo Bs-Gs2016Hp Firmware: before 1.1.7.01 — fixed in 1.1.7.01
• Buffalo Bs-Gs2016P Firmware: through 1.0.10.01; before 1.1.7.01 — fixed in 1.1.7.01
• Buffalo Bs-Gs2024 Firmware: through 1.0.10.01
• Buffalo Bs-Gs2024Hp Firmware: before 1.1.7.01 — fixed in 1.1.7.01
• Buffalo Bs-Gs2024P Firmware: through 1.0.10.01; before 1.1.7.01 — fixed in 1.1.7.01
• Buffalo Bs-Gs2048 Firmware: through 1.0.10.01
• Buffalo Bs-Gsl2005 Firmware: before 1.12-0.01 — fixed in 1.12-0.01
• Buffalo Bs-Gsl2005P Firmware: before 1.11-0.01 — fixed in 1.11-0.01
• Buffalo Bs-Gsl2008 Firmware: before 1.12-0.01 — fixed in 1.12-0.01
• Buffalo Bs-Gsl2008P Firmware: before 1.11-0.01 — fixed in 1.11-0.01
• Buffalo Bs-Gsl2016 Firmware: through 1.10-0.03
• Buffalo Bs-Gsl2016P Firmware: through 1.10-0.03
• Buffalo Bs-Gsl2024 Firmware: through 1.10-0.03

How to fix

Upgrade to a fixed version: Buffalo Bs-Gs2016Hp Firmware 1.1.7.01; Buffalo Bs-Gs2016P Firmware 1.1.7.01; Buffalo Bs-Gs2024Hp Firmware 1.1.7.01; Buffalo Bs-Gs2024P Firmware 1.1.7.01; Buffalo Bs-Gsl2005 Firmware 1.12-0.01; Buffalo Bs-Gsl2005P Firmware 1.11-0.01; Buffalo Bs-Gsl2008 Firmware 1.12-0.01; Buffalo Bs-Gsl2008P Firmware 1.11-0.01. Check the vendor advisory for mitigations.

References

• https://jvn.jp/en/vu/JVNVU96824262/
• https://www.buffalo.jp/news/detail/20230310-01.html
• https://jvn.jp/en/vu/JVNVU96824262/
• https://www.buffalo.jp/news/detail/20230310-01.html

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