LOW
CVE-2026-48851
CWE-451Published: May 25, 2026· Updated: May 27, 2026
3.1
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:9.0th
Official Description
PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session.
Technical Analysis
CVE-2026-48851 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected Vendors & Products
putty1 product
putty
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (2)
→
https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/telnet-trust-sigil.htmlPatch · Vendor Advisory
Quick Facts
CVE IDCVE-2026-48851
CVSS Score3.1 / 10
SeverityLOW
WeaknessCWE-451
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedMay 25, 2026
Related CVEs (CWE-451)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-48851 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.