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CVE-2026-0773

28
FAUCET Score

CVE-2026-0773 is a critical remote code execution vulnerability affecting Upsonic, stemming from insecure deserialization of untrusted data within the add_tool endpoint on TCP port 7541. This flaw allows unauthenticated remote attackers to execute arbitrary code with the privileges of the service account. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector and complete compromise potential. While no public exploits or active exploitation have been observed, and community discussion is minimal, the high FAUCET Risk Score of 94/100 indicates its significant inherent danger.

Impacted Technologies

VendorProductVersion(s)CPE
UpsonicUpsonic
0.52.1CNA affecteddefault unknown

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.15%
Probability of exploitation in next 30 days
EPSS Percentile
63.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0115 is in the 49th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

zerodayinitiative.com / advisories/ZDI-26-042