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CVE-2021-33514

34
FAUCET Score

CVE-2021-33514 is a critical command injection vulnerability affecting various NETGEAR network devices, allowing an unauthenticated attacker to execute arbitrary OS commands. The flaw resides in the /sqfs/lib/libsal.so.0.0 library used by a CGI application, specifically exploitable via the User-Agent field in requests to setup.cgi. With a CVSS score of 9.8 (Critical), this vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, the high FAUCET Risk Score of 95/100 indicates its severe potential.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.7.3CPE matchmatch criteria
cpe:2.3:o:netgear:gc108p_firmware:*:*:*:*:*:*:*:*
< 1.0.7.3CPE matchmatch criteria
cpe:2.3:o:netgear:gc108pp_firmware:*:*:*:*:*:*:*:*
< 7.0.6.3CPE matchmatch criteria
cpe:2.3:o:netgear:gs108t_firmware:*:*:*:*:*:*:*:*
< 7.0.6.3CPE matchmatch criteria
cpe:2.3:o:netgear:gs110tpp_firmware:*:*:*:*:*:*:*:*
< 7.0.6.3CPE matchmatch criteria
cpe:2.3:o:netgear:gs110tp_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
8.80%
Probability of exploitation in next 30 days
EPSS Percentile
94.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0880 is in the 90th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

gynvael.coldwind.pl
ExploitThird Party Advisory
kb.netgear.com / 000063641/Security-Advisory-for-Pre-Authentication-Command-Injection-Vulnerability-on-Some-Smart-Switches-PSV-2021-0071
Vendor Advisory