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CVE-2018-15317

25
FAUCET Score

CVE-2018-15317 is a denial-of-service vulnerability affecting F5 BIG-IP versions 11.2.1 through 14.0.0.2. An unauthenticated attacker can send specially crafted SSL records to an SSL Virtual Server, corrupting SSL data structures and causing intermittent decrypt BAD_RECORD_MAC errors. This high-severity vulnerability (CVSS 7.5) can render applications inaccessible until the tmm process is restarted, impacting availability. There is no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 11.2.1, <= 11.5.6CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 11.6.0, <= 11.6.3.2CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 12.1.0, <= 12.1.3.5CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 13.0.0, <= 13.1.0.7CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
>= 14.0.0, <= 14.0.0.2CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*

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
1.36%
Probability of exploitation in next 30 days
EPSS Percentile
68.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0136 is in the 49th percentile among its peer group of 51,551 CVEs.

Social Chatter

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

Remediation records are not available for this CVE.

References

support.f5.com / csp/article/K43625118
MitigationVendor Advisory
support.f5.com / csp/article/K43625118