CVE-2022-37055: D-Link Routers Buffer Overflow Vulnerability

In short

D-Link Routers has a weakness classified as classic buffer overflow (CWE-120). CISA added it to its Known Exploited Vulnerabilities catalog on 2025-12-08. NVD lists CVSS 3.1 at 9.8 CRITICAL.

What it is

“D-Link Routers contains a buffer overflow vulnerability that has a high impact on confidentiality, integrity, and availability. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.” — CISA KEV, retrieved 2026-11-01

“D-Link Go-RT-AC750 GORTAC750_revA_v101b03 and GO-RT-AC750_revB_FWv200b02 are vulnerable to Buffer Overflow via cgibin, hnap_main,” — NVD, retrieved 2026-11-01

Who is affected

D-Link Routers. NVD lists the following versions as affected:

• Versions version 2.00b02
• Versions version 1.01b03

Exploitation status

CISA KEV added: 2025-12-08. Known ransomware campaign use: Not reported by CISA. Due date CISA set for US federal civilian agencies: 2025-12-29.

Scores

NVD CVSS 3.1: 9.8 CRITICAL; vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source [email protected].

EPSS by FIRST: 55.53%; percentile 99.04; score date 2026-10-31. EPSS estimates the probability of exploitation in the next 30 days.

CWE: CWE-120.

Timeline

CISA required action

“Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.” — CISA KEV

What to do

• Confirm whether you run D-Link Routers and which version.
• Apply the vendor update or mitigation in the advisory.
• Follow CISA’s required action.
• Review the vendor guidance on signs of compromise.
• Track the fix through completion.

References

• Vendor Advisory: https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10308
• Vendor Advisory: https://www.dlink.com/en/security-bulletin/
• Third Party Advisory: https://www.fortiguard.com/outbreak-alert/d-link-multiple-devices-attack
• NVD detail
• CVE.org record
• CISA KEV catalog

Sources and dates

CISA Known Exploited Vulnerabilities Catalog, version 2026.10.30; retrieved 2026-11-01. CISA KEV data: CC0 1.0. No endorsement by CISA.

NVD retrieved: 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.

EPSS scores by FIRST; score date 2026-10-31.