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CVE-2021-36231

28
FAUCET Score

CVE-2021-36231 is a critical deserialization of untrusted data vulnerability affecting Unit4 MIK.starlight version 7.9.5.24363. This flaw allows authenticated remote attackers to execute arbitrary operating system commands by crafting malicious serialized objects. With a CVSS score of 8.8 (High), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there's minimal community discussion, organizations should still prioritize patching to mitigate potential threats.

Impacted Technologies

VendorProductVersion(s)CPE
7.9.5.24363CPE matchmatch criteria
cpe:2.3:a:unit4:mik.starlight:7.9.5.24363:*:*:*:*:*:*:*

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
2.62%
Probability of exploitation in next 30 days
EPSS Percentile
83.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0262 is in the 82nd 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

syss.de / fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-035.txt
ExploitThird Party Advisory