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TI-2020-15843 Aliases CVE-2020-25854GHSA-8q7x-wx54-w95j

Stack-based buffer overflow in Realtek RTL8195A Wi-Fi Module

Priority MEDIUM 40CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

The function DecWPA2KeyData() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for an internal function, rt_arc4_crypt_veneer() or _AES_UnWRAP_veneer(), resulting in a stack buffer overflow which can be exploited for remote code execution or denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker needs to know the network's PSK in order to exploit this.

Why it matters now

EPSS 0.0275 86th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Realtek RTL8195A Wi-Fi ModuleVersions before 2020-04-21 (up to and excluding 2.08)—No fix listedCNA
  • Realtek RTL8195A Wi-Fi Module Vendor— Affected Versions before 2020-04-21 (up to and excluding 2.08) Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:realtek:rtl8195a_firmware:*:*:*:*:*:*:*:*before 2.08VulnerableRealtek
cpe:2.3:h:realtek:rtl8195a:-:*:*:*:*:*:*:*not specified by NVDRunning onRealtek
  • cpe:2.3:o:realtek:rtl8195a_firmware:*:*:*:*:*:*:*:* Versions before 2.08 Vulnerable ·Realtek
  • cpe:2.3:h:realtek:rtl8195a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Realtek

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-25854
  2. 2026-10-03 Alias added: GHSA-8q7x-wx54-w95j

References

Exploit 1

  • TI-2020-15845 Stack-based buffer overflow in Realtek RTL8195A Wi-Fi Module CVSS 3.1HIGH 8.1
  • TI-2020-15844 Stack-based buffer overflow in Realtek RTL8195A Wi-Fi Module CVSS 3.1HIGH 8.1
  • TI-2020-16621 A stack buffer overflow in Realtek RTL8710 (and other Ameba-based devices) can lead to… CVSS 3.1HIGH 8.0
  • TI-2020-16620 A stack buffer overflow in Realtek RTL8710 (and other Ameba-based devices) can lead to… CVSS 3.1HIGH 8.0
  • TI-2020-15846 Stack-based buffer overflow in Realtek RTL8195A Wi-Fi Module CVSS 3.1HIGH 7.5
  • TI-2020-15842 Out-of-bounds read in Realtek RTL8195A Wi-Fi Module CVSS 3.1HIGH 7.5

Sources

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