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CVE-2016-9553

37
FAUCET Score

CVE-2016-9553 describes two remote command injection vulnerabilities in the Sophos Web Appliance (version 4.2.1.3) web administrative interface, specifically within the MgrReport.php component. Attackers can exploit these flaws by injecting system commands into the 'unblockip' and 'blockip' variables due to improper escaping before calling the shell_exec() function. With a CVSS v3.0 score of 7.2 (HIGH), this vulnerability allows an authenticated attacker to achieve high confidentiality, integrity, and availability impacts. While not actively exploited in the wild or on the KEV catalog, a Metasploit module (EDB-41413) exists, indicating readily available exploit code, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.1.3CPE matchmatch criteria
cpe:2.3:a:sophos:web_appliance:4.2.1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.2HIGH

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
19.46%
Probability of exploitation in next 30 days
EPSS Percentile
97.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-41413 · Dec 12, 2016
This CVE's current EPSS score of 0.1946 is in the 95th percentile among its peer group of 5,531 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

pastebin.com / DUYuN0U5
Exploit
community.sophos.com / products/web-appliance/b/blog/posts/release-of-swa-version-4-3-1
Release Notes
swa.sophos.com / rn/swa/concepts/ReleaseNotes_4.3.1.html
Release Notes
securityfocus.com / bid/95853
Third Party AdvisoryVDB Entry