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CVE-2020-13656

31
FAUCET Score

CVE-2020-13656 is a critical out-of-bounds read/write vulnerability affecting Morgan Stanley Hobbes through May 21, 2020, stemming from a lack of bounds checking in its array implementation. This flaw allows for both local and remote code execution via RPC, posing a severe risk to affected systems. With a CVSS score of 9.8 (Critical), it is easily exploitable over the network without user interaction, leading to complete compromise of confidentiality, integrity, and availability. Despite its critical severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2020-05-21CPE matchmatch criteria
cpe:2.3:a:morganstanley:hobbes:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.14%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0214 is in the 69th percentile among its peer group of 36,862 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

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.

Remediation

Remediation records are not available for this CVE.

References

know.bishopfox.com / advisories/oob-to-rce-exploitation-of-the-hobbes-functional-interpreter
ExploitTechnical DescriptionThird Party Advisory