CVE-2026-5244

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

0.73% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 51.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-04-02 08:00Z5 MO AGO

Last updated

2026-04-02 13:31Z5 MO AGO

Reserved

2026-03-31

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

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

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-122Heap-based Buffer OverflowVariant

Data version

5.2

Document digest

04424a4ffe74c6dad78cc0e6aeab2d743d6b5597a51a99ccdb42604260829195

• vuldb.comVDB-354825 | Cesanta Mongoose TLS 1.3 mongoose.c mg_tls_recv_cert heap-based overflowhttps://vuldb.com/vuln/354825vdb-entrytechnical-description
• vuldb.comVDB-354825 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/354825/ctisignaturepermissions-required
• vuldb.comSubmit #770063 | Cesanta Mongoose 7.20 Heap-based Buffer Overflowhttps://vuldb.com/submit/770063third-party-advisory
• github.comhttps://github.com/cesanta/mongoose/commit/0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1patch
• github.comhttps://github.com/cesanta/mongoose/releases/tag/7.21patch
• github.comhttps://github.com/cesanta/mongoose/product