HIGH
CVE-2026-59999
CWE-348Published: July 8, 2026· Updated: Jul 9, 2026
7.5
CVSS v3.1
EPSS:0.13%probability of exploitation in 30 daysPercentile:3.1th
Official Description
In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.
Technical Analysis
CVE-2026-59999 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Vendors & Products
openbsd1 product(s)
openssh
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.
All References (3)
→
https://www.openssh.org/releasenotes.html#10.4p1Release Notes
→
https://www.openwall.com/lists/oss-security/2026/07/06/5Mailing List · Release Notes
Quick Facts
CVE IDCVE-2026-59999
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-348
CISA KEVNo
EPSS (30d)0.13%
Affected1 vendor(s)
PublishedJul 8, 2026
Related CVEs (CWE-348)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-59999 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.