PT-2025-17649 · Totolink · Totolink A800R

Published 2025-04-23 · Updated 2025-04-28 · CVE-2025-28020

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions TOTOLINK A800R version 4.1.2cu.5137 B20200730

Description A buffer overflow issue was discovered in the downloadFile.cgi endpoint through the v25 parameter. This allows for potential exploitation.

Recommendations For TOTOLINK A800R version 4.1.2cu.5137 B20200730, as a temporary workaround, consider restricting access to the downloadFile.cgi endpoint until a patch is available. Avoid using the v25 parameter in the downloadFile.cgi endpoint to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2025-10008

CVE-2025-28020

Affected Products

Totolink A800R

References · 9

• 🔥 https://locrian-lightning-dc7.notion.site/CVE-2025-28020-BufferOverflow3-1948e5e2b1a280c28ef5c6e54b49324d · Exploit
• 🔥 https://locrian-lightning-dc7.notion.site/BufferOverflow3-1948e5e2b1a280c28ef5c6e54b49324d?pvs=73 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-28020 · Security Note
• https://osv.dev/vulnerability/CVE-2025-28020 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-10008 · Security Note
• https://twitter.com/cracbot/status/1916809691679633698 · Twitter Post
• https://t.me/cvedetector/23615 · Telegram Post
• https://twitter.com/CVEnew/status/1915091921464389807 · Twitter Post
• https://vuldb.com/?id.306023 · Note