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CVE-2015-6280

26
FAUCET Score

CVE-2015-6280 describes an authentication bypass vulnerability in the SSHv2 functionality of Cisco IOS and IOS XE. This flaw allows remote attackers to gain unauthorized login access by exploiting improper RSA authentication, requiring only knowledge of a valid username and its associated public key. With a CVSS score of 9.3, this vulnerability is critical, enabling complete compromise of confidentiality, integrity, and availability with medium attack complexity and no authentication required. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it did receive limited media coverage at the time of disclosure.

Impacted Technologies

VendorProductVersion(s)CPE
15.2\(1\)syCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(1\)sy:*:*:*:*:*:*:*
15.2\(1\)sy0aCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(1\)sy0a:*:*:*:*:*:*:*
15.2\(2\)eCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(2\)e:*:*:*:*:*:*:*
15.2\(2\)e1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(2\)e1:*:*:*:*:*:*:*
15.2\(2\)e2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2\(2\)e2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.39%
Probability of exploitation in next 30 days
EPSS Percentile
90.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0439 is in the 55th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 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)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20150923-sshpk
Vendor Advisory
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20150923-sshpk/cvrf/cisco-sa-20150923-sshpk_cvrf.xml
Vendor Advisory
securitytracker.com / id/1033646
Third Party AdvisoryVDB Entry