CVE-2025-65502 json
Null pointer dereference in add_ca_certs() in Cesanta Mongoose before 7.2 allows remote attackers to cause a denial of service via TLS init…
published 2025-11-24 11 mo ago modified 2026-11-05 4 d ago also EUVD-2025-198709
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
Null pointer dereference in add_ca_certs() in Cesanta Mongoose before 7.2 allows remote attackers to cause a denial of service via TLS initialization where SSL_CTX_get_cert_store() returns NULL.
Patch / fix
- cesanta mongoose 7.2
- swupdate Debian 14 2025.12+dfsg-1
debian advisories DEBIAN-CVE-2025-65502
- github.com/cesanta/mongoose#3307 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/cesanta/mongoose/issues/3306 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
References
-
github.com
/cesanta/mongoose/pull/3307
issue-tracking, patch
-
github.com
/cesanta/mongoose/issues/3306
exploit, issue-tracking
Sources
- CVE List CVE-2025-65502
- NVD CVE-2025-65502
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.