This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UA_Parser utility. A crafted Host Name option in a DHCP request can trigger execution of a system call composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11076.
総合評価: CVE-2020-27861 は中リスク（63.7/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 2.03%、78 パーセンタイル） 根拠: 直近 1 日で EPSS が +1.01% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.02% | 2.03% | +1.01% |
| 2 | 2026-01-20 | 0.12% | 1.02% | +0.90% |
| 3 | 2025-11-21 | — | 0.12% | — |
EPSS の全履歴 （全 17 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
| 8.8 | 3.0 | HIGH |
|
2.8 | 5.9 | [email protected] |
| 8.3 | 2.0 | HIGH |
|
6.5 | 10.0 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| netgear | cbk40_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:cbk40_firmware:*:*:*:*:*:*:*:* |
| netgear | cbk43_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:cbk43_firmware:*:*:*:*:*:*:*:* |
| netgear | cbr40_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:cbr40_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6200_firmware | < 1.0.1.82 | cpe:2.3:o:netgear:ex6200_firmware:*:*:*:*:*:*:*:* |
| netgear | ex7700_firmware | < 1.0.0.210 | cpe:2.3:o:netgear:ex7700_firmware:*:*:*:*:*:*:*:* |
| netgear | ex8000_firmware | < 1.0.1.224 | cpe:2.3:o:netgear:ex8000_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk12_firmware | < 2.6.1.44 | cpe:2.3:o:netgear:rbk12_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk13_firmware | < 2.6.1.44 | cpe:2.3:o:netgear:rbk13_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk14_firmware | < 2.6.1.44 | cpe:2.3:o:netgear:rbk14_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk15_firmware | < 2.6.1.44 | cpe:2.3:o:netgear:rbk15_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr10_firmware | < 2.6.1.44 | cpe:2.3:o:netgear:rbr10_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs10_firmware | < 2.6.1.44 | cpe:2.3:o:netgear:rbs10_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk20w_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk20w_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk23w_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk23w_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk20_router_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk20_router_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk20_satellite_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbk20_satellite_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk22_router_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk22_router_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk22_satellite_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbk22_satellite_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk23_router_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk23_router_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk23_satellite_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbk23_satellite_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr20_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbr20_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs20_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbs20_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk30_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk30_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk33_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk33_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk40_router_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk40_router_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk40_satellite_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbk40_satellite_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk43_router_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk43_router_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk43_satellite_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbk43_satellite_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk43s_router_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk43s_router_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk43s_satellite_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbk43s_satellite_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk44_router_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbk44_router_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk44_satellite_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbk44_satellite_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr40_firmware | < 2.6.1.36 | cpe:2.3:o:netgear:rbr40_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs40_firmware | < 2.6.1.38 | cpe:2.3:o:netgear:rbs40_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk50_firmware | < 2.6.1.40 | cpe:2.3:o:netgear:rbk50_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk50v_firmware | < 2.6.1.40 | cpe:2.3:o:netgear:rbk50v_firmware:*:*:*:*:*:*:*:* |
| netgear | rbk52w_firmware | < 2.6.1.40 | cpe:2.3:o:netgear:rbk52w_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr50_firmware | < 2.6.1.40 | cpe:2.3:o:netgear:rbr50_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs50_firmware | < 2.6.1.40 | cpe:2.3:o:netgear:rbs50_firmware:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://kb.netgear.com/000062507/Security-Advisory-for-Unauthenticated-Command-Injection-Vulnerability-on-Some-Extenders-and-Orbi-WiFi-Systems | Vendor Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-20-1430/ | Third Party Advisory VDB Entry |