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TI-2024-07795 Aliases CVE-2024-8408GHSA-wv2q-3c9c-q6v7

Linksys WRT54G POST Parameter apply.cgi validate_services_port stack-based overflow

Priority MEDIUM 57CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A vulnerability was found in Linksys WRT54G 4.21.5. It has been rated as critical. Affected by this issue is the function validate_services_port of the file /apply.cgi of the component POST Parameter Handler. The manipulation of the argument services_array leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00751 55th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinksysWRT54G4.21.5—No fix listedCNA
  • WRT54G VendorLinksys Affected 4.21.5 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linksys:wrt54g_firmware:4.21.5:*:*:*:*:*:*:*4.21.5VulnerableLinksys
cpe:2.3:h:linksys:wrt54g:-:*:*:*:*:*:*:*not specified by NVDRunning onLinksys
  • cpe:2.3:o:linksys:wrt54g_firmware:4.21.5:*:*:*:*:*:*:* Versions 4.21.5 Vulnerable ·Linksys
  • cpe:2.3:h:linksys:wrt54g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linksys

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-8408
  2. 2026-10-03 Alias added: GHSA-wv2q-3c9c-q6v7

References

Exploit 1

Other 1

  • TI-2024-27567 Linksys WRT54G v4.21.5 has a stack overflow vulnerability in get_merge_mac function. CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences