CVE-2020-27861
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2020-27861- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
EUVDEUVD-2020-20354
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.
- Record
EUVD-2020-20354- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jwqc-9f7p-v456 No score
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected...
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.
- Record
GHSA-jwqc-9f7p-v456- Weakness
- CWE-78
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2020-27861- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 8.8 High
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 8.3 High
AV:A/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-78
- Updated
- 2026-11-02
Affected products
- netgear orbi
- netgear cbk40 firmware
- netgear cbk43 firmware
- netgear cbr40 firmware
- netgear ex6200 firmware
- netgear ex7700 firmware
- netgear ex8000 firmware
- netgear rbk12 firmware
- netgear rbk13 firmware
- netgear rbk14 firmware
- netgear rbk15 firmware
- netgear rbk20 router firmware
Show 28 moreShow less
- netgear rbk20 satellite firmware
- netgear rbk20w firmware
- netgear rbk22 router firmware
- netgear rbk22 satellite firmware
- netgear rbk23 router firmware
- netgear rbk23 satellite firmware
- netgear rbk23w firmware
- netgear rbk30 firmware
- netgear rbk33 firmware
- netgear rbk40 router firmware
- netgear rbk40 satellite firmware
- netgear rbk43 router firmware
- netgear rbk43 satellite firmware
- netgear rbk43s router firmware
- netgear rbk43s satellite firmware
- netgear rbk44 router firmware
- netgear rbk44 satellite firmware
- netgear rbk50 firmware
- netgear rbk50v firmware
- netgear rbk52w firmware
- netgear rbr10 firmware
- netgear rbr20 firmware
- netgear rbr40 firmware
- netgear rbr50 firmware
- netgear rbs10 firmware
- netgear rbs20 firmware
- netgear rbs40 firmware
- netgear rbs50 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-27861 is a high vulnerability (CVSS 8.8) in Netgear Orbi, published February 11, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.12%, the 81st percentile. No source names a fixed version.