CVE-2025-43878

Description

When running in Appliance mode, an authenticated attacker assigned the Administrator or Resource Administrator role may be able to bypass Appliance mode restrictions utilizing system diagnostics tcpdump command utility on a F5OS-C/A system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS v3.1 Score

6.0

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-149 CWE-149

CWE-1286 CWE-1286

Affected Products

Vendor	Product	Versions
f5	f5os-a	1.5.1 — 1.8.0
f5	f5os-c	1.6.0 — 1.6.2
f5	r10600	All
f5	r10800	All
f5	r10900	All
f5	r12600-ds	All
f5	r12800-ds	All
f5	r12900-ds	All
f5	r5600	All
f5	r5800	All
f5	r5900	All
f5	velos_cx1610	All
f5	velos_cx410	All

References

Advisories & Patches

https://my.f5.com/manage/s/article/K000139502

Frequently Asked Questions

What is CVE-2025-43878? +

When running in Appliance mode, an authenticated attacker assigned the Administrator or Resource Administrator role may be able to bypass Appliance mode restrictions utilizing system diagnostics tcpdump command utility on a F5OS-C/A system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. It has a CVSS v3.1 base score of 6.0 (MEDIUM).

How severe is CVE-2025-43878? +

CVE-2025-43878 has a CVSS v3.1 score of 6.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-43878? +

CVE-2025-43878 affects products from f5, specifically: f5os-a, f5os-c, r10600, r10800, r10900, r12600-ds, r12800-ds, r12900-ds, r5600, r5800, r5900, velos_cx1610, velos_cx410. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-43878? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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