NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.
総合評価: CVE-2021-34947 は中リスク（49.8/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.55%、41 パーセンタイル） 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 | 0.39% | 0.55% | +0.16% |
| 2 | 2025-11-21 | 0.29% | 0.39% | +0.10% |
| 3 | 2025-11-18 | — | 0.29% | — |
EPSS の全履歴 （全 9 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 | 3.0 | HIGH |
|
2.8 | 5.9 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| netgear | d7800_firmware | < 1.0.1.64 | cpe:2.3:o:netgear:d7800_firmware:*:*:*:*:*:*:*:* |
| netgear | ex2700_firmware | < 1.0.1.66 | cpe:2.3:o:netgear:ex2700_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6100_firmware | < 1.0.1.106 | cpe:2.3:o:netgear:ex6100_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6150_firmware | < 1.0.1.106 | cpe:2.3:o:netgear:ex6150_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6200_firmware | < 1.0.1.86 | cpe:2.3:o:netgear:ex6200_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6250_firmware | < 1.0.0.146 | cpe:2.3:o:netgear:ex6250_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6400_firmware | < 1.0.2.164 | cpe:2.3:o:netgear:ex6400_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6400v2_firmware | < 1.0.0.146 | cpe:2.3:o:netgear:ex6400v2_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6410_firmware | < 1.0.0.146 | cpe:2.3:o:netgear:ex6410_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6420_firmware | < 1.0.0.146 | cpe:2.3:o:netgear:ex6420_firmware:*:*:*:*:*:*:*:* |
| netgear | ex6500v1_firmware | < 1.0.0.146 | cpe:2.3:o:netgear:ex6500v1_firmware:*:*:*:*:*:*:*:* |
| netgear | ex7300_firmware | < 1.0.2.164 | cpe:2.3:o:netgear:ex7300_firmware:*:*:*:*:*:*:*:* |
| netgear | ex7300v2_firmware | < 1.0.0.146 | cpe:2.3:o:netgear:ex7300v2_firmware:*:*:*:*:*:*:*:* |
| netgear | ex7320_firmware | < 1.0.0.146 | cpe:2.3:o:netgear:ex7320_firmware:*:*:*:*:*:*:*:* |
| netgear | ex7700_firmware | < 1.0.0.222 | cpe:2.3:o:netgear:ex7700_firmware:*:*:*:*:*:*:*:* |
| netgear | ex8000_firmware | < 1.0.1.238 | cpe:2.3:o:netgear:ex8000_firmware:*:*:*:*:*:*:*:* |
| netgear | lbr1020_firmware | < 2.6.5.32 | cpe:2.3:o:netgear:lbr1020_firmware:*:*:*:*:*:*:*:* |
| netgear | lbr20_firmware | < 2.6.5.32 | cpe:2.3:o:netgear:lbr20_firmware:*:*:*:*:*:*:*:* |
| netgear | r6700ax_firmware | < 1.0.5.108 | cpe:2.3:o:netgear:r6700ax_firmware:*:*:*:*:*:*:*:* |
| netgear | r7800_firmware | < 1.0.2.84 | cpe:2.3:o:netgear:r7800_firmware:*:*:*:*:*:*:*:* |
| netgear | r8900_firmware | < 1.0.5.36 | cpe:2.3:o:netgear:r8900_firmware:*:*:*:*:*:*:*:* |
| netgear | r9000_firmware | < 1.0.5.36 | cpe:2.3:o:netgear:r9000_firmware:*:*:*:*:*:*:*:* |
| netgear | rax10_firmware | < 1.0.5.108 | cpe:2.3:o:netgear:rax10_firmware:*:*:*:*:*:*:*:* |
| netgear | rax120_firmware | < 1.2.2.24 | cpe:2.3:o:netgear:rax120_firmware:*:*:*:*:*:*:*:* |
| netgear | rax120v2_firmware | < 1.2.2.24 | cpe:2.3:o:netgear:rax120v2_firmware:*:*:*:*:*:*:*:* |
| netgear | rax70_firmware | < 1.0.5.108 | cpe:2.3:o:netgear:rax70_firmware:*:*:*:*:*:*:*:* |
| netgear | rax78_firmware | < 1.0.5.108 | cpe:2.3:o:netgear:rax78_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr10_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbr10_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr20_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbr20_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr40_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbr40_firmware:*:*:*:*:*:*:*:* |
| netgear | rbr50_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbr50_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs10_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbs10_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs20_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbs20_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs40_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbs40_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs50_firmware | < 2.7.4.24 | cpe:2.3:o:netgear:rbs50_firmware:*:*:*:*:*:*:*:* |
| netgear | rbs50y_firmware | < 2.7.4.12 | cpe:2.3:o:netgear:rbs50y_firmware:*:*:*:*:*:*:*:* |
| netgear | wn3000rpv2_firmware | < 1.0.0.88 | cpe:2.3:o:netgear:wn3000rpv2_firmware:*:*:*:*:*:*:*:* |
| netgear | wnr2000v5_firmware | < 1.0.0.78 | cpe:2.3:o:netgear:wnr2000v5_firmware:*:*:*:*:*:*:*:* |
| netgear | xr450_firmware | < 2.3.2.130 | cpe:2.3:o:netgear:xr450_firmware:*:*:*:*:*:*:*:* |
| netgear | xr500_firmware | < 2.3.2.130 | cpe:2.3:o:netgear:xr500_firmware:*:*:*:*:*:*:*:* |
| netgear | xr700_firmware | < 1.0.1.44 | cpe:2.3:o:netgear:xr700_firmware:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2021-0129 | Third Party Advisory |
| https://www.zerodayinitiative.com/advisories/ZDI-21-1116/ | Third Party Advisory |