Page generated: 09 Nov 2026, 11:41 UTC
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CVE-2020-3259

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve memory contents on an affected device, which could lead to the disclosur…

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A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve memory contents on an affected device, which could lead to the disclosure of confidential information. The vulnerability is due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. An attacker could exploit this vulnerability by sending a crafted GET request to the web services interface. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
CVSS 7.5 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
1.4/10
REALITY · THREAT PRIORITY
8.5/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.5: +1.12
  • Fresh EPSS: 71.50%: +0.36

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

Sources: 11 documents and public datasets.

Hype components

Headline sample (25%)
10/100
Press, 30 days (60%)
20/100
Grounded branding (15%)
0/100
HYPE TOTAL14/100

Sources and documents

Cyber Press
Press · 21 Oct 2026, 07:00 · FBI Reveals How SafePay Ransomware Hackers Breached 600+ Organizations Worldwide - Cyber Press
GBHackers News
Press · 21 Oct 2026, 07:00 · CISA Warns SafePay Ransomware Has Hit 600+ Organizations and Destroyed Backup Systems - GBHackers News
The Cyber Express
Press · 20 Oct 2026, 07:00 · FBI, CISA Warn SafePay Ransomware Has Hit 600+ Victims - The Cyber Express
The Record from Recorded Future News
Press · 20 Oct 2026, 07:00 · FBI says SafePay ransomware gang ‘among most active’ with more than 600 victims since 2024 - The Record from Recorded Future News
Huntress
Press · 21 Nov 2025, 08:00 · CVE-2020-3259 Vulnerability: Analysis, Impact, Mitigation - Huntress
See all 11 source documents
Cybersecurity Dive
Press · 13 Nov 2025, 08:00 · Akira engaged in ransomware attacks against critical sectors - Cybersecurity Dive
Cisco Talos Blog
Press · 21 Oct 2024, 07:00 · Akira ransomware continues to evolve - Cisco Talos Blog
Kroll
Press · 19 Apr 2024, 07:00 · Akira Ransomware Makes a Play for VPNs Without Multi-Factor Authentication - Kroll
The Record from Recorded Future News
Press · 18 Apr 2024, 07:00 · Akira ransomware gang made $42 million from 250 attacks since March 2023: FBI - The Record from Recorded Future News
SecurityWeek
Press · 16 Feb 2024, 08:00 · CISA Urges Patching of Cisco ASA Flaw Exploited in Ransomware Attacks - SecurityWeek
BleepingComputer
Press · 02 Feb 2024, 08:00 · The Week in Ransomware - February 2nd 2024 - No honor among thieves - BleepingComputer

Score evolution

● Hype   ● Reality

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

024681002 Nov 2026 · OBSERVED EXPLOITATION + LOWER RECENT ATTENTIONHype 2.5Reality 8.503 Nov 2026 · OBSERVED EXPLOITATION + LOWER RECENT ATTENTIONHype 1.4Reality 8.5Nov 2Nov 3

━ Hype Score (Perceived)  ━ Reality threat priority. Definition changes are not new attacks.

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 7.5; EPSS 71.5%
Attention, last 30 days
4 distinct story titles; 4 press documents; 1 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 13:58:17.488851+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
06 May 2020, 16:41
First press mention
02 Feb 2024, 08:00
Added to the CISA KEV catalog
15 Feb 2024, 00:00
Latest press mention
21 Oct 2026, 07:00
Score calculated
05 Nov 2026, 13:58