CVE-2016-4538 is a critical vulnerability affecting PHP versions before 5.5.35, 5.6.21, and 7.0.6, specifically within the bcpowmod function of the bcmath extension. This flaw allows remote attackers to trigger a denial of service or potentially other impacts by manipulating global variables through crafted calls. With a CVSS score of 9.8 (CRITICAL), it presents a high risk due to its network-based attack vector, low complexity, and potential for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, nor publicly available exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 5.5.33CPE matchmatch criteria | cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | ||
5.6.0CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.0:*:*:*:*:*:*:* | ||
5.6.1CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:* | ||
5.6.2CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:* | ||
5.6.3CPE matchmatch criteria | cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/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.