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CVE-2025-27920

68
FAUCET Score

CVE-2025-27920 is a directory traversal vulnerability affecting Srimax Output Messenger versions prior to 2.0.63. Attackers can exploit improper file path handling using "../" sequences to access sensitive files, potentially leading to configuration leakage or arbitrary file access. This vulnerability carries a CVSS score of 8.8 (HIGH) due to its network-accessible, low-privilege attack vector and high impact on confidentiality, integrity, and availability. Notably, CVE-2025-27920 is actively exploited as a zero-day, with evidence of nation-state actors leveraging it in espionage campaigns. While no public exploit code is available, it has garnered significant community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.63CPE matchmatch criteria
cpe:2.3:a:srimax:output_messenger:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.77%
Probability of exploitation in next 30 days
EPSS Percentile
75.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Added to KEV · May 19, 2025
This CVE's current EPSS score of 0.0177 is in the 74th percentile among its peer group of 17,844 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

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

Remediation

Vendor Patches (1)

microsoftworkaround availablevia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
microsoft.com / en-us/security/blog/2025/05/12/marbled-dust-leverages-zero-day-in-output-messenger-for-regional-espionage
MitigationThird Party Advisory
outputmessenger.com / cve-2025-27920
Vendor Advisory
srimax.com / products-2/output-messenger
Product