CVE-2020-27539 describes a critical heap overflow vulnerability (CWE-787) in the AgentUpdater service of Rostelecom CS-C2SHW 5.0.082.1 firmware. This flaw, stemming from a self-written HTTP parser, allows for an out-of-bounds write when processing HTTP responses. With a CVSS score of 9.8 (Critical), this vulnerability has a network attack vector, low attack complexity, and can lead to complete compromise of confidentiality, integrity, and availability. While currently unexploited and lacking public exploit code or community discussion, its default configuration requires an additional bug to make the vulnerable code reachable.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.0.082.1CPE matchmatch criteria | cpe:2.3:o:company:cs-c2shw_firmware:5.0.082.1:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.