CVE-2026-55737

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 20.8% of scored records. A rank, not a probability.

NVD base score

5.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Analyzed. NVD last modified this record on 2026-08-10.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-27 15:13Z1 MO AGO

Last updated

2026-07-28 09:55Z1 MO AGO

Reserved

2026-06-17

Assigning CNA

EEF

Record state

PUBLISHED

Severity

Medium (CVSS 5.1)

CNA CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Weaknesses

• CWE-195Signed to Unsigned Conversion ErrorVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

64640402f2309f0fc2fcf7862cc6121e290e005bc9698bf8d2bb2ed71162e2ab

• github.comhttps://github.com/erlang/otp/security/advisories/GHSA-446w-268v-9462vendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-55737.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-55737related
• www.erlang.orghttps://www.erlang.org/doc/system/versions.html#order-of-versionsx_version-scheme
• github.comhttps://github.com/erlang/otp/commit/c5210b42a9d3d96f3d25601942ce8122be0f3761patch