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CVE-2021-35508

27
FAUCET Score

CVE-2021-35508 describes a privilege escalation vulnerability in TeraRecon AQNetClient 4.4.13, specifically within the NMSAccess32.exe component. This flaw allows a low-privileged user to execute arbitrary code with SYSTEM privileges by modifying the service configuration or overwriting the binary. Rated 8.8 HIGH on CVSS, it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.4.13CPE matchmatch criteria
cpe:2.3:a:terarecon:aquariusnet:4.4.13:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
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
1.48%
Probability of exploitation in next 30 days
EPSS Percentile
71.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0148 is in the 69th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

terarecon.sharefile.com / d-s05c8b7792f354a2d8115789a02449c4a
ProductThird Party Advisory
linkedin.com / pulse/cve-2021-35508-privilege-escalation-via-weak-windows-marshall-mba
ExploitThird Party Advisory