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CVE-2020-12271

87
FAUCET Score

CVE-2020-12271 is a critical SQL injection vulnerability affecting Sophos XG Firewall devices running SFOS versions 17.0, 17.1, 17.5, and 18.0 before April 25, 2020. This flaw, with a CVSS score of 9.8, allowed remote code execution and exfiltration of local administrator and user credentials if the administration or User Portal services were exposed on the WAN. It has been actively exploited in the wild, including in ransomware campaigns, and has garnered significant community discussion and media coverage, despite no public exploit code being readily available.

Impacted Technologies

VendorProductVersion(s)CPE
17.0CPE matchmatch criteria
cpe:2.3:o:sophos:sfos:17.0:*:*:*:*:*:*:*
17.1CPE matchmatch criteria
cpe:2.3:o:sophos:sfos:17.1:*:*:*:*:*:*:*
17.5CPE matchmatch criteria
cpe:2.3:o:sophos:sfos:17.5:*:*:*:*:*:*:*
18.0CPE matchmatch criteria
cpe:2.3:o:sophos:sfos:18.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

10.0CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
42.16%
Probability of exploitation in next 30 days
EPSS Percentile
98.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Nov 3, 2021
This CVE's current EPSS score of 0.4216 is in the 96th percentile among its peer group of 36,833 CVEs.

Social Chatter

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.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
community.sophos.com / kb/en-us/135412
Vendor Advisory
cwe.mitre.org / data/definitions/89.html
Third Party Advisory
news.sophos.com / en-us/2020/04/26/asnarok
ExploitVendor Advisory