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CVE-2015-6432

20
FAUCET Score

CVE-2015-6432 describes a denial-of-service vulnerability affecting multiple versions of Cisco IOS XR (4.2.0 through 5.3.2). The flaw stems from improper restriction of Path Computation Elements (PCEs) in OSPF LSA opaque area updates, allowing remote attackers to trigger a device reload with a crafted update. With a CVSS v3 score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:4.2.0:*:*:*:*:*:*:*
4.3.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:4.3.0:*:*:*:*:*:*:*
5.0.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.0.0:*:*:*:*:*:*:*
5.1.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.1.0:*:*:*:*:*:*:*
5.2.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:5.2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.76%
Probability of exploitation in next 30 days
EPSS Percentile
75.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0176 is in the 58th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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-20160104-iosxr
Vendor Advisory
securitytracker.com / id/1034570