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CVE-2020-12271

A SQL injection issue was found in SFOS 17.0, 17.1, 17.5, and 18.0 before 2020-04-25 on Sophos XG Firewall devices, as exploited in the wild in April 2020. This affected devices configured with either the administration (HTTPS) service or the User Portal exposed on the WAN zone. …

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A SQL injection issue was found in SFOS 17.0, 17.1, 17.5, and 18.0 before 2020-04-25 on Sophos XG Firewall devices, as exploited in the wild in April 2020. This affected devices configured with either the administration (HTTPS) service or the User Portal exposed on the WAN zone. A successful attack may have caused remote code execution that exfiltrated usernames and hashed passwords for the local device admin(s), portal admins, and user accounts used for remote access (but not external Active Directory or LDAP passwords)
CVSS 10.0 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.7/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 10: +1.50
  • Fresh EPSS: 42.43%: +0.21

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 12 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Halcyon Anti-Ransomware Platform
Press · 16 Dec 2024, 08:00 · Last Week in Ransomware: 12.16.2024 - Halcyon Anti-Ransomware Platform
Infosecurity Magazine
Press · 11 Dec 2024, 08:00 · US Sanctions Chinese Firm at Center of Global Firewall Hack - Infosecurity Magazine
The Hacker News
Press · 11 Dec 2024, 08:00 · U.S. Charges Chinese Hacker for Exploiting Zero-Day in 81,000 Sophos Firewalls - The Hacker News
The Hacker News
Press · 05 Nov 2024, 08:00 · FBI Seeks Public Help to Identify Chinese Hackers Behind Global Cyber Intrusions - The Hacker News
Industrial Cyber
Press · 04 Nov 2024, 08:00 · Sophos reports five-year investigation into China-based cyber threats targeting critical infrastructure, FBI weighs in - Industrial Cyber
See all 12 source documents
The Record from Recorded Future News
Press · 01 Nov 2024, 07:00 · FBI wants more info on hackers behind Sophos exploitation after report on China’s intrusions - The Record from Recorded Future News
Sophos
Press · 31 Oct 2024, 07:00 · Pacific Rim timeline: Information for defenders from a braid of interlocking attack campaigns - Sophos
SecurityWeek
Press · 26 Sep 2022, 07:00 · Sophos Firewall Zero-Day Exploited in Attacks on South Asian Organizations - SecurityWeek
Security Affairs
Press · 21 May 2020, 07:00 · Sophos blocked attacks exploiting XG Firewall zero-day to deploy Ransomware - Security Affairs
TechTarget
Press · 27 Apr 2020, 07:00 · Zero-day flaw in Sophos XG Firewall exploited in attacks - TechTarget
TechTarget
Press · 27 Apr 2020, 07:00 · Zero-day flaw in Sophos XG Firewall exploited in attacks - TechTarget
Rapid7
Press · 27 Apr 2020, 07:00 · CVE-2020-12271: Sophos XG Firewall SQL Injection Vulnerability - Rapid7

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.7 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 10; EPSS 42.4%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:13.266659+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
27 Apr 2020, 04:00
First press mention
27 Apr 2020, 07:00
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
16 Dec 2024, 08:00
Score calculated
05 Nov 2026, 13:58
Source: CVE List V5 · CISA KEV · FIRST EPSS · GitHub · RSSVulnRadar