CVE-2025-27458
CVE-2025-27458
The VNC authentication mechanism bases on a challenge-response system where both server and client use the same password for encryption. The challenge is sent from the server to the client, is encrypted by the client and sent back. The server does the same encryption locally and if the responses match it is prooven that the client knows the correct password. Since all VNC communication is unencrypted, an attacker can obtain the challenge and response and try to derive the password from this information.
Published Updated Sources: cvelistV5, SICK AG
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Unreported
no source claims exploitation
EPSS
0%
chance of exploitation in 30 days
CVSS base
6.5
MEDIUM
CISA SSVC assessment
Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.
Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script all four kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component
Affected scope
The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.
Vendors (1)
Products (1)
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 6.5 | CVSS 3.1 | MEDIUM | — | — | cvelistV5 |
Weakness & attack patterns
- CWE-327
Attack patterns reported against this CVE. The ATT&CK techniques below are inferred from its weakness class.
- T1036.001Masquerading: Invalid Code Signature
- T1553.002Subvert Trust Controls: Code Signing
References
6 on the record
- www.endress.com
x_Endress+Hauser
- sick.com/psirt
x_SICK PSIRT Security Advisories
- www.cisa.gov/resources-tools/resources/ics-recommended-practices
x_ICS-CERT recommended practices on Industrial Security
- www.first.org/cvss/calculator/3.1
x_CVSS v3.1 Calculator
- www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.json
x_The canonical URL.
- www.sick.com/.well-known/csaf/white/2025/sca-2025-0008.pdf
vendor-advisory
Elsewhere on this site
- endress hauserevery CVE for this vendor
- CWE-327other pages naming this weakness
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.