How severe is CVE-2018-5508?

CVE-2018-5508 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-5508 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5508?

CVE-2018-5508 primarily affects F5 Big-ip Policy Enforcement Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-5508?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-5508 published?

CVE-2018-5508 was published on 2018-04-13 and last updated on 2026-06-17.

CVE-2018-5508

CVE-2018-5508 is a medium-severity vulnerability in F5 Big-ip Policy Enforcement Manager with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: F5 Big-ip Policy Enforcement Manager
Published: 2018-04-13
Last modified: 2026-06-17

Description

On F5 BIG-IP PEM versions 13.0.0, 12.0.0-12.1.3.1, 11.6.0-11.6.2, 11.5.1-11.5.5, or 11.2.1, under certain conditions, TMM may crash when processing compressed data though a Virtual Server with an associated PEM profile using the content insertion option.

Frequently asked questions

What is CVE-2018-5508?: On F5 BIG-IP PEM versions 13.0.0, 12.0.0-12.1.3.1, 11.6.0-11.6.2, 11.5.1-11.5.5, or 11.2.1, under certain conditions, TMM may crash when processing compressed data though a Virtual Server with an associated PEM profile using the content insertion option.
How severe is CVE-2018-5508?: CVE-2018-5508 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-5508 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-5508?: CVE-2018-5508 primarily affects F5 Big-ip Policy Enforcement Manager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-5508?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-5508 published?: CVE-2018-5508 was published on 2018-04-13 and last updated on 2026-06-17.

References

https://support.f5.com/csp/article/K10329515

Affected products (3)

cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:11.2.1:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:13.0.0:*:*:*:*:*:*:*

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