CVE-2021-34980 json
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6260 1.1.0.78_1.0.1 ro…
published 2022-01-13 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21627
- cvss
- 8.8
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 72%
- public exploits
- 0
- none known
Summary
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6260 1.1.0.78_1.0.1 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the setupwizard.cgi page. When parsing the SOAP_LOGIN_TOKEN environment variable, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-14107.
Exploit prediction
1.42% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 8.8 | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 8.3 | AV:A/AC:L/Au:N/C:C/I:C/A:C |
Affected products
- NETGEAR R6260
Classification
References
-
kb.netgear.com
/000064262/Security-Advisory-for-Vertical-Privilege-Escalation-on-Some-Routers-PSV-2021-0150?article=000064262
vendor-advisory
-
zerodayinitiative.com
/advisories/ZDI-21-1242/
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-34980
- NVD CVE-2021-34980
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