VulnSocial

CVE-2026-25920Disclosure(sumatrapdfreader / sumatrapdf)

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, a heap out-of-bounds read vulnerability exists in SumatraPDF's MOBI HuffDic decompressor. The bounds check in AddCdicData() only validates half the range that DecodeOne() actually accesses. Opening a crafted .mobi file can read nearly (1 << codeLength) bytes beyond the CDIC dictionary buffer, leading to a crash.

sumatrapdfreader CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Exploit / PoC references
Other references
Weakness type (CWE)
CWE-125

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • sumatrapdf

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
sumatrapdfreader
Products
sumatrapdf

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-02-10: 1Technical Details · 2026-02-10: 102-10
Signal classification1 categories
Disclosure
1100.0%
Referenced assets2 URLs
Full discourse1 post
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-25920 Heap Out-of-Bounds Read Vulnerability in SumatraPDF MOBI File Parsing https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-25920 Vulnerability Notification: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=3

    Post summary

    The text announces a newly disclosed heap out‑of‑bounds read vulnerability (CVE‑2026‑25920) in SumatraPDF’s MOBI parsing, with no PoC, exploit, or patch information provided.

    0000075
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appsumatrapdfreadersumatrapdf---

Explore more

Back to dashboardsumatrapdfreader CVEssumatrapdf vulnerabilities