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CVE-2021-3328

25
FAUCET Score

CVE-2021-3328 describes an out-of-bounds read vulnerability in Aprelium Abyss Web Server X1 versions 2.12.1 and 2.14, which can be triggered by a specially crafted HTTP request, leading to application crashes. This vulnerability carries a high CVSS score of 7.5, indicating it can be exploited remotely with low attack complexity and no user interaction, resulting in high availability impact. While no public exploit code or active exploitation has been observed, and community discussion is minimal, organizations using affected versions should consider patching or mitigation strategies.

Impacted Technologies

VendorProductVersion(s)CPE
2.12.1CPE matchmatch criteria
cpe:2.3:a:aprelium:abyss_web_server_x1:2.12.1:*:*:*:*:*:*:*
2.14CPE matchmatch criteria
cpe:2.3:a:aprelium:abyss_web_server_x1:2.14:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.80%
Probability of exploitation in next 30 days
EPSS Percentile
76.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0181 is in the 59th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

jankopecky.net / index.php/2021/04/08/cve-2021-3328-abyss-web-server-remote-dos
ExploitThird Party Advisory